{"title":"15+ STI Short Blocks","description":"\u003ca href=\"https:\/\/www.newprovisionsracing.com\/collections\/15-sti-motor-builds\" title=\"2015+ Subaru STI Motor Builds\"\u003e\u0026lt;- Back to Motor Builds\u003c\/a\u003e","products":[{"product_id":"iag-stage-2-2-5l-subaru-short-block","title":"IAG 550 2.5L Subaru Short Block - EJ WRX\/STI\/LGT\/FXT","description":"\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe IAG 550 Short Block is designed for modified EJ25 Subarus that need a stronger short block to support increased cylinder pressures created by additional boost pressure. The IAG 550 short block features IAG Spec H-Beam forged connecting rods. The upgraded connecting rods and race bearings are able to support additional engine load produced by larger turbochargers or increased boost which the OEM STI rods found in the Stock short blocks cannot support reliably.\u003c\/span\u003e\u003cbr\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIAG 550 Short Block Includes:\u003cbr\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase Halves - \u003c\/strong\u003eBrand new Subaru OEM case halves 99.5mm stock bore\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePistons - \u003c\/strong\u003eIAG-Spec JE 99.5mm Forged Pistons, Ring Set, .180\" Chromoly Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pin)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnecting Rods - \u003c\/strong\u003eIAG-Spec H-Beam Rods with ARP2000 rod bolts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRod \/ Main Bearings - \u003c\/strong\u003eACL or King Race Bearings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrankshaft - \u003c\/strong\u003eStandard New Subaru Nitride Treated 2017+ STI Crankshaft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase \/ Main Bolts - \u003c\/strong\u003eStandard FHI Subaru case bolt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompression Ratio: \u003c\/strong\u003e8.5:1 on D Cylinder Heads (EJ255), 8.2:1 on B, V, and W EJ257 Heads with standard thickness gasket.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IAG","offers":[{"title":"Default Title","offer_id":13426839388221,"sku":"IAG-ENG-S550","price":4499.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1614\/0589\/products\/api13uxz3__40268.1633558626.1280.1280__66374.jpg?v=1755098494"},{"product_id":"iag-stage-2-5-ej25-subaru-closed-deck-short-block-wrx-sti-lgt-fxt","title":"IAG 750 EJ25 Subaru Closed Deck Short Block - WRX\/STI\/LGT\/FXT","description":"\u003cspan data-mce-fragment=\"1\"\u003eThe IAG 750 Short Block is designed to solve the majority of common problems which plague modified EJ25 engines, especially at higher horsepower levels. The IAG 750 short block builds off our IAG 550 block's strengths by adding our proprietary closed deck system. This system strengthens and supports the cylinder walls to prevent cracks which can occur with increased cylinder pressures. (This is the most common issue when increasing horsepower.) The IAG 750 also features 99.75mm JE Forged Pistons and IAG Spec H beam connecting rods, along with ACL or King Race bearings. These components also significantly strengthen the common failure points such as cracked ring lands and spun bearings.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cmeta charset=\"UTF-8\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIAG 750 Closed Deck Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCase Halves - \u003c\/strong\u003eConverted to Closed Deck using brand new Subaru OEM case halves, bored and honed to 99.75mm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePistons - \u003c\/strong\u003eIAG-Spec JE FSR 99.75mm 2618 Forged Pistons, Ring Set, .210\" 9310 Steel Wrist Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pins)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eConnecting Rods - \u003c\/strong\u003eIAG-Spec Tuff H-Beam \/ ARP2000 Rod Bolts.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRod \/ Main Bearings - \u003c\/strong\u003eACL or King Race bearings.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCrankshaft - \u003c\/strong\u003eStandard New Subaru Nitride Treated 2017+ STI Crankshaft.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCase \/ Main Bolts - \u003c\/strong\u003eStandard FHI Subaru case bolts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eCompression Ratio:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e8.5:1 on D Cylinder Heads (EJ255)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e8.2:1 on B, V and W EJ257 Heads with standard thickness gasket.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e","brand":"IAG","offers":[{"title":"Default Title","offer_id":42608336464,"sku":"IAG-ENG-S750","price":5499.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1614\/0589\/products\/IAG-ENG-1250-2.jpg?v=1755098479"},{"product_id":"iag-performance-crest-cnc-stage-x-2-5l-subaru-billet-aluminum-short-block-wrx-sti-lgt-fxt","title":"IAG Performance \/ Crest CNC Stage X 2.5L Subaru Billet Aluminum Short Block - WRX\/STI\/LGT\/FXT","description":"\u003cmeta charset=\"UTF-8\"\u003e\n\u003cp\u003eThe CNC Billet Aluminum EJ case seeks to change the Subaru performance tuning market by reinventing the EJ and addressing virtually every weakness that exists in max-power builds. \u003cbr\u003e\u003cbr\u003eEach IAG \/ Crest CNC Case is machined from 6061-T6 Aerospace Aluminum and features Darton Ductile Iron Sleeves. The block is designed with increased material thickness over the OEM cast aluminum case halves and adds a unique 4-bolt bottom end for additional strength. \u003cbr\u003e\u003cbr\u003eThe IAG \/ Crest CNC Stage X Block, (Formally Willall) is a complete short block built on the Crest billet platform, which also includes pistons, rods, bearings, crank, bore\/hone, case bolts, line hone, and final assembly and blueprinting. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eStage X Billet EJ25 Case Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMachined from solid billet 6061-T6 Aerospace grade aluminum\u003c\/li\u003e\n\u003cli\u003eDarton Ductile iron sleeves\u003c\/li\u003e\n\u003cli\u003eIncreased material thickness in all known weak points (around head studs, bottom end location)\u003c\/li\u003e\n\u003cli\u003eUnique 4 bolt bottom end strengthening\u003c\/li\u003e\n\u003cli\u003eThreads are rolled into the block rather than conventionally cut for much greater strength\u003c\/li\u003e\n\u003cli\u003eFull cooling system operation\u003c\/li\u003e\n\u003cli\u003eRadiused coolant and oil galleries for improved flow and less foaming\/turbulence\u003c\/li\u003e\n\u003cli\u003eFits all factory engine bay ancillaries (i.e. AC\/PS\/etc.)\u003c\/li\u003e\n\u003cli\u003eMultiple Times stiffer and stronger than the stock case\u003c\/li\u003e\n\u003cli\u003ePrecision machined for a superior surface finish\u003c\/li\u003e\n\u003cli\u003eHard anodized to avoid marking or straining\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIAG Stage X Complete Shortblock Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase - \u003c\/strong\u003eCrest Billet \/ Sleeved Case Halves\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFire-Lock - \u003c\/strong\u003eIAG Fire-Lock receiver groove machining, latest solution to prevent head gasket failure on high horsepower and high boost Subaru's - *IAG Fire-Lock head gaskets required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachining - \u003c\/strong\u003eMachined for 14mm Head Studs *(Studs sold separately \/ Note the proper head gaskets or head gasket modifications are required for proper fitment with 14mm studs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePistons - \u003c\/strong\u003eIAG-Spec JE FSR 99.75mm 2618 Forged Pistons, Electro-nickel Plated Tops \u0026amp; Ring area, Ring Set, .250\" \/ .927\" H13 Wrist Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pins)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnecting Rods - \u003c\/strong\u003eIAG-Spec +2mm Tri-Beam w\/ ARP625+ Rod Bolts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRod\/Main Bearings - \u003c\/strong\u003eACL\/King Race Bearings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrankshaft - \u003c\/strong\u003eIAG Billet Crank by Callies\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase \/ Main Bolts - \u003c\/strong\u003eARP Main Bolts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Options Available:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Studs - \u003c\/strong\u003eIAG \/ ARP Spec 14mm head studs, nuts, and washers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil Pumps - \u003c\/strong\u003eSubaru JDM 12mm Oil Pump \/ OEM Subaru 11mm Oil Pump\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIAG Oil Pickup\u003c\/strong\u003e - Upgraded oil pickup featuring heavy gauge steel tubing, 2 point bracket \u0026amp; mesh filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIAG Oil Baffle\u003c\/strong\u003e - Upgraded oil control baffle and windage tray\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIAG Oil Pickup \u0026amp; Baffle Set\u003c\/strong\u003e - Upgraded oil pickup, oil control baffle, and windage tray\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware \/ Seal Option - \u003c\/strong\u003e(Includes: Wrist pin plugs, washers, separator cover, bolts, etc. In case you don't want to transfer from the original engine).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRequired:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e*IAG Fire-Lock .051\" Head Gaskets with IAG-Spec Alloy Ring Set* PN# IAG-ENG-1740\u003c\/li\u003e\n\u003cli\u003e14mm Head Studs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e8.5:1 on D Cylinder Heads (EJ255)\u003c\/li\u003e\n\u003cli\u003e8.2:1 on B, V and W EJ257 Heads with standard thickness gasket.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe IAG \/ Crest CNC Stage X Short Block has a power output rating of 1100+BHP.\u003cbr\u003e\u003cbr\u003e*All IAG short blocks are balanced and blueprinted.\u003c\/p\u003e","brand":"IAG","offers":[{"title":"Default Title","offer_id":13427042713661,"sku":"IAG-ENG-SX25","price":17999.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1614\/0589\/products\/IAG-ENG-1610-2.jpg?v=1755098473"},{"product_id":"iag-stage-2-7-magnum-ej25-subaru-closed-deck-short-block-wrx-sti-fxt-lgt","title":"IAG 950 EJ25 Subaru Closed Deck Short Block - WRX\/STI\/FXT\/LGT","description":"\u003cmeta charset=\"UTF-8\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe IAG 950 Short Block is the ultimate \"weekend racer\" block. Built to withstand up to 950 BHP, this is our strongest \"Street\" short block offering. The IAG 950 short block features +2mm IAG Spec H-Beam forged connecting rods, IAG-Spec JE Pistons with electroless nickel plated coating with H13 tool steel wrist pins, and our venerable \"Fire-Lock™\" head gasket system for 14mm head studs. Each IAG 950 short block is hand assembled using ACL or King rod and main bearings. This combination of parts makes the IAG 950 the perfect block for drag or road racing.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cmeta charset=\"UTF-8\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIAG 950 Closed Deck EJ25 Short Block Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCase Halves - \u003c\/strong\u003eConverted to Closed Deck using brand new Subaru OEM case halves, bored and honed to 99.75mm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eFire-Lock - \u003c\/strong\u003eIAG Fire-Lock™ receiver groove machining, latest solution to prevent head gasket failure on high horsepower and high boost Subaru's - *IAG Fire-Lock™ head gaskets required\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHead Studs - \u003c\/strong\u003eMachine Case for 14mm head studs - *Head studs are sold separately\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePistons - \u003c\/strong\u003eIAG-Spec JE FSR 99.75mm 2618 Forged Pistons, Electroless Nickel Plated Tops \u0026amp; Ring area, Ring Set, .250\" \/ .906\" H13 Wrist Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pins)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eConnecting Rods - \u003c\/strong\u003eIAG-Spec Tuff H-Beam +2mm \/ ARP 625+ Rod Bolts.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRod \/ Main Bearings - \u003c\/strong\u003eACL or King Race bearings.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCrankshaft - \u003c\/strong\u003eStandard New Subaru Nitride Treated 2017+ STI Crankshaft.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCase \/ Main Bolts - \u003c\/strong\u003eStandard FHI Subaru case bolts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eCompression Ratio:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e8.5:1 on D Cylinder Heads (EJ255)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e8.2:1 on B, V and W EJ257 Heads with standard thickness gasket.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eHead Gasket Required:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e*IAG \u003cspan data-mce-fragment=\"1\"\u003eFire-Lock™\u003c\/span\u003e .051\" Head Gaskets with IAG-Spec Alloy Ring Set* PN# IAG-ENG-1740\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e","brand":"IAG","offers":[{"title":"Default Title","offer_id":13426906824765,"sku":"IAG-ENG-S950","price":6499.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1614\/0589\/products\/IAG-ENG-1270-2_8610eed7-0d1d-4d48-b9eb-19d6abc009b1.jpg?v=1755098468"},{"product_id":"iag-stage-4-extreme-ej25-subaru-closed-deck-short-block-wrx-sti-lgt-fxt","title":"IAG 1150 2.5L EJ25 Subaru Closed Deck Short Block - WRX\/STI\/LGT\/FXT","description":"\u003cspan data-mce-fragment=\"1\"\u003eThe IAG 1150 Short Block is designed for those who plan to drag race their high horsepower Subarus regularly. While still a streetable block, the IAG 1150 is designed for the track. This block includes additional features to further strengthen the OEM case halves including Stage 4 Closed Decking and pinned mains secured with ARP case hardware. Our record-setting \"Fire-Lock\" Head Gasket system and 14mm head studs are used to ensure a tight seal even in extreme conditions. The IAG 1150 Short Block features IAG Spec \"Tri-Beam\" +2mm forged connecting rods. An IAG Spec Billet Crankshaft is used to support additional oiling and prevent main bearing distortion. The upgraded block, billet crank, connecting rods, race bearings, and forged pistons are able to support additional engine load produced by the largest turbochargers and the most demanding uses including competition drag racing.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cmeta charset=\"UTF-8\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIAG 1150 Closed Deck EJ25 Short Block Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCase Halves - \u003c\/strong\u003eConverted to Closed Deck from brand new OEM Subaru case halves, bored and honed to 99.75mm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePinned Mains - \u003c\/strong\u003eMachine case for 9.5mm pinned mains and lined honed.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eFire-Lock - \u003c\/strong\u003eIAG Fire-Lock™ receiver groove machining, latest solution to prevent head gasket failure on high horsepower and high boost Subaru's - *IAG Fire-Lock™ head gaskets required\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHead Studs - \u003c\/strong\u003eMachined for 14mm Head Studs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePistons - \u003c\/strong\u003eIAG-Spec JE FSR 99.75mm 2618 Forged Pistons, Electroless Nickel Plated Tops \u0026amp; Ring area, Ring Set, .250\" \/ .927\" H13 Wrist Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pins)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eConnecting Rods - \u003c\/strong\u003eIAG-Spec +2mm Tri-Beam Connecting Rods with ARP 625+ Rod Bolts.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRod \/ Main Bearings - \u003c\/strong\u003eACL or King Race Bearings.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCrank - \u003c\/strong\u003eIAG-Spec Billet Crank\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCase \/ Main Bolts - \u003c\/strong\u003eARP Main Bolts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eCompression Ratio:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e8.5:1 on D Cylinder Heads (EJ255)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e8.2:1 on B, V and W EJ257 Heads with standard thickness gasket.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eHead Gasket Required:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e*IAG Fire-Lock™ .051\" Head Gaskets with IAG-Spec Alloy Ring Set* PN# IAG-ENG-1740\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e","brand":"IAG","offers":[{"title":"Default Title","offer_id":13427026919485,"sku":"IAG-ENG-S115","price":9499.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1614\/0589\/products\/IAG-ENG-1270-2_71db4243-493a-4c9a-9fb4-f9915c2c5d38.jpg?v=1755098465"},{"product_id":"subaru-oem-sti-short-block-08-sti","title":"Subaru OEM STI Short Block - 08-18 STI","description":"\u003cp\u003eSometimes life gives us our fair share of oops. Whether if you thought it was a good idea to boost without a tune, to boost without proper fuel mods, or if you lost to an Evo, RallySport Direct has the right tools, the right parts, and especially the right short blocks to get you back on the road. \u003c\/p\u003e\n\u003cp\u003eOn this page, you are looking at the Subaru OEM 2.5L EJ257B STI Short Block. This is a fully assembled short block that includes all of the main guts such as the factory pistons and rods, as well as the crankshaft and main seals to make it ready for the installation. You or your preferred mechanic would have to bolt on the heads, oil pan, and fill it with the proper fluids to make your vehicle roadworthy again. \u003c\/p\u003e","brand":"Subaru","offers":[{"title":"Default Title","offer_id":14152099233853,"sku":"SUB 10103AC890","price":2283.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1614\/0589\/products\/SUB_10103AC890-1.jpeg?v=1571439678"},{"product_id":"subaru-oem-2-5l-sti-type-ra-2020-sti-short-block","title":"Subaru OEM 2.5L STI Type RA \/ 2020 STI Short Block","description":"\u003cp\u003eThe block is the same casting as the latest engines, numbered \"705.\" The crankshaft is the same nitrided, full-counterweight design found in previous EJ25s. Unfortunately, the crankshaft doesn't have the additional oiling ports found in other special edition EJs. The bearings and clearances thus far have been within typical late-model EJ257 specs as well.\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eType RA Piston Differences\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eUpon initial impression, the Type RA and STI piston are both machined cast pistons. The dish volume measured out very close to each other and the valve reliefs are the same depth. Unfortunately the Type RA does not have forged pistons as some had hoped for, although we haven't ruled out the possibility that the Type RA pistons are made from a different alloy that is less susceptible to fracturing (more ductile), as they are supplied by Hitachi rather than Aisin. The crown on the Type RA pistons appears to be 1 - 2mm thicker than the STI piston as well, which is hard to discern from the picture.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eFrom the side profile you can see a few differences. First, the coating at the top ringland is extended to the crown on the earlier STI pistons. This is likely due to manufacturing differences (less tooling \/ different tooling) rather than any specific performance difference. Second, there is considerably more material supporting the wrist pin on the Type RA piston.\u003c\/p\u003e\n\u003cp\u003eCompression height, ring position, and other dimensions appear to be the same. Meaning, there are no changes to the ringlands in position or thickness. Top ring gaps were 0.010\", 0.010\", 0.011\", 0.011\". and lower ring gaps were 0.014\", 0.014\", 0.014\" 0.015\".\u003c\/p\u003e\n\u003cp\u003eFrom the bottom you can see how much material was added to the wrist pin area (in red) as well as the reduction in the large center support (in green). The Type RA design is superior for piston rigidity since it reduces the amount of cantilever, as well as giving better support to the wrist pin itself.\u003c\/p\u003e\n\u003cp\u003eEarlier STI pistons weigh in at 414 grams while the Type RA pistons weigh 424 grams. The extra 10 grams of weight is not a big deal when you consider the improvements made to the piston design. For comparison, forged pistons for the EJ257 typically weigh in the 370 - 400 gram range depending on bore size and design. The wrist pins weighed the same for both motors.\u003c\/p\u003e\n\u003ch2\u003eType RA Con Rod Differences\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe Type RA rods are identical to the GR STI's rods as far as my eyes tell me. Not a big surprise considering the rods are definitely not the weak link in the motor. There are some differences in the late model rods compared to the earlier EJ257 rods and the EJ207 rods, notably the closed channel on the big end's internal bore and the lack of a perpendicular reinforcement rib .\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Subaru","offers":[{"title":"Default Title","offer_id":34975171510431,"sku":"SUB 10103AD020","price":2510.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1614\/0589\/products\/SUB_10103AC890-1_1ef2c6c9-6a71-4166-8359-588e075d8c72.jpeg?v=1593725052"},{"product_id":"subaru-genuine-oem-2018-type-ra-case-halves-empty-11008ab360","title":"Subaru Genuine OEM 2018 Type RA Case Halves Empty - 11008AB360","description":"\u003cp\u003eThe 2018 STI Type RA got a lot of new engine components, and one of them is the EJ257 case itself. \u003c\/p\u003e\n\u003cp\u003eThis is the empty case from an 2018 STI Type RA.\u003cbr\u003eThis is a completely empty engine block, and you will need to add all the internals for it to be a functioning engine.\u003c\/p\u003e\n\u003cp\u003eThis is a brand new Subaru part, but if you are putting it in a car that it was not originally designed for, there is no warranty expressed or implied.\u003c\/p\u003e\n\u003cp\u003eDoes not include, pistons, rods, bearings etc. This is a brand new bare case half set.\u003c\/p\u003e","brand":"Subaru","offers":[{"title":"Default Title","offer_id":44863032819901,"sku":"SUB 11008AB360","price":1682.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1614\/0589\/products\/11008AA930-3.jpg?v=1571439587"},{"product_id":"outfront-motorsports-new-575-ej257-2-5l-short-block-sti","title":"Outfront Motorsports New 575 EJ257 2.5L Short Block STI","description":"\u003cp\u003e\u003cstrong\u003eThis Block Is Our Base Non Closed Deck (Semi Closed) EJ257 With Forged Internals. 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The billet material that reinforces the combustion area has been further optimized with our V3 closed deck block in the known problem areas making it a far superior product to any sleeved block. With a closed deck block the stock sleeves are still in place eliminating all risk of dropping sleeves and pushing coolant that you have with a sleeved block.\u003c\/p\u003e\n\u003cp\u003eThis Block is rated to 775 BHP before adding upgrades.\u003c\/p\u003e\n\u003cdiv\u003e\u003cstrong\u003eThis engine consists of the following parts:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eNew EJ257 case halves\u003c\/li\u003e\n\u003cli\u003eV3 Closed Deck Process\u003c\/li\u003e\n\u003cli\u003eForged Pistons (Default is JE but you can choose other options below)\u003c\/li\u003e\n\u003cli\u003eOutfront Motorsports H Beam Rods\u003c\/li\u003e\n\u003cli\u003eKing Performance Bearings\u003c\/li\u003e\n\u003cli\u003eNew OEM Subaru Nitrite Treated Crankshaft\u003c\/li\u003e\n\u003cli\u003eRear Covers, Rear Seal, and Pin Plugs Included!!!\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Outfront Motorsports","offers":[{"title":"JE 8.5:1 CR Part Number 296348","offer_id":45728118702269,"sku":"OUT-SB-775","price":5299.0,"currency_code":"USD","in_stock":true},{"title":"Manley Turbo Tuff 8.5:1 Part Number 632202C-4","offer_id":45728118735037,"sku":"OUT-SB-776","price":5299.0,"currency_code":"USD","in_stock":true},{"title":"CP 8.2:1 Part Number SC7422 (+$80.00)","offer_id":45728118767805,"sku":"OUT-SB-777","price":5379.0,"currency_code":"USD","in_stock":true},{"title":"JE Hybrid Piston For EJ20 Heads Part number 296349","offer_id":45728118800573,"sku":"OUT-SB-778","price":5299.0,"currency_code":"USD","in_stock":true},{"title":"JE 8.5:1 Ultra Part Number 361328 (+$180.00)","offer_id":45728118833341,"sku":"OUT-SB-779","price":5479.0,"currency_code":"USD","in_stock":true},{"title":"Custom Manley For EJ255 W\/ D25 Heads","offer_id":45728118866109,"sku":"OUT-SB-780","price":5299.0,"currency_code":"USD","in_stock":true},{"title":"CP 9:1 CR Part Number SC7426 (+$80.00)","offer_id":45728118898877,"sku":"OUT-SB-781","price":5379.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1614\/0589\/files\/OUT-SB-FA20DIT-GG_png.webp?v=1697729306"},{"product_id":"outfront-motorsports-grocery-getter-forged-ej257-short-block","title":"Outfront Motorsports \"Grocery Getter\" Forged EJ257 Short Block","description":"\u003cdiv\u003e\u003cstrong\u003eThis Block Is Our Base Non Closed Deck (Semi Closed) EJ257 With Forged Internals. Power Rating is 575 BHB\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eThis engine consists of the following parts:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eSeasoned EJ257 case halves\u003c\/li\u003e\n\u003cli\u003eForged Pistons (Default is JE but you can choose any shelf JE, Manley, or CP piston)\u003c\/li\u003e\n\u003cli\u003eOutfront Motorsports H Beam Rods\u003c\/li\u003e\n\u003cli\u003eKing Performance Bearings\u003c\/li\u003e\n\u003cli\u003eNew OEM Subaru \u003cspan\u003eNitride \u003c\/span\u003eTreated Crankshaft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDEFAULT:\u003c\/strong\u003e JE Forged Piston Set Part Number 296348\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNo Core required!!\u003c\/h3\u003e\n\u003cp\u003eIf you have higher power goals or are looking for something different from this block, feel free to contact us to get the correct built block for your application. All of our builds can be completely customized. All of our assembly is done in house in our clean room to ensure excellent quality control. Our Blocks are all bored\/honed using torque plates. All tolerances are double checked and all parts are thoroughly cleaned and inspected prior to assembly.\u003c\/p\u003e","brand":"Outfront Motorsports","offers":[{"title":"JE 8.5:1 CR Part Number 296348","offer_id":45786980286653,"sku":"OUT-SB-775","price":3750.0,"currency_code":"USD","in_stock":true},{"title":"Wiseco 8.5:1 CR Part Number K598M9975AP","offer_id":45786980319421,"sku":"OUT-SB-776","price":3750.0,"currency_code":"USD","in_stock":true},{"title":"CP 8.2:1 CR Part number SC7422","offer_id":45786980352189,"sku":"OUT-SB-777","price":3750.0,"currency_code":"USD","in_stock":true},{"title":"Manley Platinum 8.5:1 CR Part Number 612002C-4","offer_id":45786980384957,"sku":"OUT-SB-778","price":3750.0,"currency_code":"USD","in_stock":true},{"title":"JE 9.5:1 CR Part Number 310937","offer_id":45786980417725,"sku":"OUT-SB-779","price":3750.0,"currency_code":"USD","in_stock":true},{"title":"Mahle 4032 PowerPak Low Expansion 8.2:1 CR Part Number 930285027","offer_id":45786980450493,"sku":"OUT-SB-780","price":5299.0,"currency_code":"USD","in_stock":true},{"title":"CP 9:1 CR Part Number SC7426","offer_id":45786980483261,"sku":"OUT-SB-781","price":5379.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1614\/0589\/files\/OUT-SB-GG_jpg.webp?v=1760469772"}],"url":"https:\/\/www.newprovisionsracing.com\/collections\/15-sti-short-blocks.oembed","provider":"New Provisions Racing","version":"1.0","type":"link"}