Products

GrimmSpeed has a unique design which allows you to keep your PCV valve while separating the oil out of the crankcase and head ventilation air. None...

GrimmSpeed has a unique design which allows you to keep your PCV valve while separating the oil out of the crankcase and head ventilation air. None...

The Grimmspeed aluminum alternator cover for the Subaru WRX and STI replaces the ugly factory cover in your choice of Red, Silver and Black. Laser ...

The Grimmspeed aluminum alternator cover for the Subaru WRX and STI replaces the ugly factory cover in your choice of Red, Silver and Black. Laser ...

The Antenna Delete Plate is made from black powder-coated aluminum that is fade-resistant to the sun. Installation is easy and the end result appea...

The WRX offers a unique change of pace, as the factory 2-port solenoid is mounted directly to the plastic turbo inlet and interfaces with an o-ring...

GrimmSpeed BroTie mounting bracket for Hella Horns and other accessories. GrimmSpeed engineers overlaid 3D scans of GD, GR and VA chassis core sup...

The GrimmSpeed Charge Pipe kit replaces the restrictive plastic stock unit on the FA20 powered WRX with larger diameter CNC mandrel bent aluminum t...

The GrimmSpeed Charge Pipe kit replaces the restrictive plastic stock unit on the FA20 powered WRX with larger diameter CNC mandrel bent aluminum t...

Real 10whp gains in 30min with no tuning. Design requirements for this intake were simple: The intake must not only be safe for the engine, but per...

Real 10whp gains in 30min with no tuning. Design requirements for this intake were simple: The intake must not only be safe for the engine, but per...

The design requirements for this intake are similar to our others: the intake should reduce as much restriction as possible, it should be easy to t...

Based on our testing and research, design requirements for this intake became simple. The MAF sensor must be protected from the heat of the engine ...

The design requirements for this intake are similar to our others: the intake should reduce as much restriction as possible, it should be easy to t...

Based on our testing and research, design requirements for this intake became simple. The MAF sensor must be protected from the heat of the engine ...

GrimmSpeed™ OEM Style Gasket, OEM quality without the high OEM price. At GrimmSpeed™ we have worked with endless amounts of aftermarket gaskets, no...

GrimmSpeed™ OEM Style Gasket, OEM quality without the high OEM price. At GrimmSpeed™ we have worked with endless amounts of aftermarket gaskets, no...

GrimmSpeed™ OEM Style Gasket, OEM quality without the high OEM price. At GrimmSpeed™ they have worked with endless amounts of aftermarket gaskets, ...

Do away with the flimsy, boring factory fabric shrouds and make your engine bay stand out with the BRAND NEW GrimmSpeed Fender Shrouds for the 2...

Do away with the flimsy, boring factory fabric shrouds and make your engine bay stand out with the BRAND NEW GrimmSpeed Fender Shrouds for the 2...

GrimmSpeed intercoolers have set the gold standard of how a high-performance heat exchanger should be crafted. These intercoolers have always maint...

GrimmSpeed intercoolers have set the gold standard of how a high-performance heat exchanger should be crafted. These intercoolers have always maint...

GrimmSpeed intercoolers have set the gold standard of how a high-performance heat exchanger should be crafted. These intercoolers have always maint...

GrimmSpeed intercoolers have set the gold standard of how a high-performance heat exchanger should be crafted. These intercoolers have always maint...