The PERRIN Performance Up-Pipe is one of the best ways to increase the power and throttle response on your Turbocharged Subaru.
The PERRIN Up-Pipe inside diameter best matches the OEM exhaust manifold outlet and OEM turbo inlet. This is critical to maintaining exhaust gas velocity increasing turbo spool up. Typically they see 250-350 RPM quicker turbo spool up after installation.
Made from 1.75" CNC mandrel bent 321 stainless steel tubing and precision welded to CNC machined 304 SS flanges that are counterbored for smooth air flow.