Black Ceramic Coated HiFlow Exhaust Manifold Crosspipe (001002) by GrimmSpeed. Subaru supplies its turbo owners with a tiny little crosspipe from the factory. 50%...
The internal wastegate(IWG) bracket is used in place of the stock wastegate actuator when moving to an external wastegate setup. In previous years, Subaru...
RallySport Direct proudly carries a great selection of quality automotive performance upgrades brought to you by GrimmSpeed. This is the GrimmSpeed Alternator Cover. This...
Antenna Delete Plate by GrimmSpeed. 1 Piece. The GrimmSpeed Antenna Delete Plate replaces the OEM whip-style antenna that many drivers dislike and therefore do...
The GrimmSpeed Turbocharger Program started by recognizing a need in the market for a robust, quick-spooling and high-performing turbo. Design began from the ground...
When developing the intercooler, we applied our experience to focus on key factors such as increased airflow, reduced restriction, and higher flow rates, resulting...
The GrimmSpeed MazdaSpeed3 Boost Control Solenoid is designed to work with your factory computer (requires tuning). It will not reduce the life of your...
The GrimmSpeed MazdaSpeed6 Boost Control Solenoid is designed to work with your factory computer (requires tuning). It will not reduce the life of your...