GrimmSpeed

DESCRIPTION This is the GrimmSpeed Air Oil Separator. If you're familiar with modifying your vehicle, then you will know the importance of an air/o...

DESCRIPTION This is the GrimmSpeed Air Oil Separator. If you're familiar with modifying your vehicle, then you will know the importance of an air/o...

DESCRIPTION Tired of being teased for your corroded alternator and boring engine bay? Step your Alternator Cover game up; GrimmSpeed has just what ...

EMISSIONS CARB Certified - EO - #D-896-3 for listed fitments The GrimmSpeed Charge Pipe Kit replaces the restrictive stock plastic unit on the FA2...

DESCRIPTION We decided on a subtle design for this cover that mimics the “vent” styling on our matching GrimmSpeed Alternator Cover. Is it made fro...

IT'S TIME TO DITCH THOSE NASTY YELLOW CAPS It's a simple fact: the yellow OEM Subaru engine bay caps are just plain UGLY. They don't match anything...

THE SHROUDS YOU DIDN'T KNOW YOU NEEDED! The original GrimmSpeed Fender Shrouds for the 15+ chassis were SUCH a big hit that we decided to introduce...

DESCRIPTION The GrimmSpeed Fender Shrouds have been designed to fill in the unsightly factory gap between the insides of your front fenders, and th...

DESCRIPTION Engineered for real-world performance and durability, the GrimmSpeed Front Strut Bar adds critical front-end rigidity to your 2008–2014...

DESCRIPTION The GrimmSpeed Front Strut Bar for the 2015-2021 Subaru WRX/STI blends precision engineering with clean aesthetics to deliver serious p...

DESCRIPTION Lightweight Batteries are an excellent and inexpensive way to remove weight from your Subaru, which has an OEM battery tipping the scal...

IMPROVE ENGINE RESPONSE AND FASTER REV'S In our opinion, the OEM Subaru crank pulley has been a cause for concern ever since its original design. ...

DESCRIPTION The GrimmSpeed Red Lightweight Crank Pulley reduces the rotational mass of the system, allowing your engine to accelerate and decelerat...

DESCRIPTION Protect your 2015–2021 Subaru WRX or STI with GrimmSpeed Mudflaps, designed specifically for the VA chassis. These mudflaps shield your...

ADD A TOUCH OF CLASS TO YOUR BAY! Some OE parts look passable and others miss the mark. In the case of the factory post MAF hose, the quicker you c...

DESCRIPTION Thie GrimmSpeed Red Post-MAF Hose kit has been designed to replace the OEM hose to increase the flow to improve the overall power and r...

DESCRIPTION Thie GrimmSpeed Red Post-MAF Hose kit has been designed to replace the OEM hose to increase the flow to improve the overall power and r...

DESCRIPTION The GrimmSpeed Pulley Cover is a great way to improve the aesthetics of your engine bay by replacing the simple OEM cover that is plast...

DESCRIPTION This is the GrimmSpeed Radiator Hose Kit. These radiator hoses feature multi-layer silicone construction that is built to last while im...

Your Subaru’s cooling system is only as good as its weakest link, commonly that’s the old, dry-rotted OEM coolant hoses. As your Subaru ages and th...

DESCRIPTION This is the GrimmSpeed Radiator Hose Kit. These radiator hoses feature multi-layer silicone construction that is built to last while im...

3 PROBLEMS. 1 CLEVERY SOLUTION. How many times have you lost a wrench or socket in your engine bay? Yeah, that's what we thought, too many to count...

3 PROBLEMS. ONE SOLUTION. How many times have you lost a wrench or socket in your engine bay? Yeah, that's what I thought, too many to count. Final...

DESCRIPTION The GrimmSpeed Radiator Shroud has been designed to improve the overall cooling efficiency of your vehicle by channeling the incoming a...

DESCRIPTION The GrimmSpeed StealthBox Cold Air Intake System is the result of countless invested hours in research and development to provide the p...

DESCRIPTION The GrimmSpeed Red StealthBox Cold Air Intake System is the result of countless invested hours in research and development to provide t...