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GrimmSpeed Stage 1 Power Package Black - 15-21 WRX

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Improve the performance in your vehicle with the Grimmspeed Stage 1 Power Package. The stage 1 Power Package consists of an upgraded Stealthbox Cold Air Intake system that replaces the factory restrictive unit, and allows the turbocharger to breathe better which increases horsepower, torque, and improves throttle response. Additionally, Grimmspee. . . Show More >


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