2008-2014 Subaru STI Engine

This dry element intake filter is dimensionally identical to the oiled air filters that are included with the GrimmSpeed WRX/STI/BRZ/FRS/LGT Intake...

DESCRIPTION The GrimmSpeed Engine Bay Cap Set completely replaces the OEM yellow caps under the hood of all 2008-21 WRX and STI models, as well as ...

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...

MORE RELIABILITY WITH BETTER SERVICEABILITY Clean up your engine bay, avoid common issues and make it easier to service your EJ turbocharger by add...

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

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

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

THE NEXT LEVEL OF BOOST CONTROL Welcome to the most refined manual boost controller available on the market today. During development, we worked ha...

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. I...

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. ...

MINIMIZE HEAT SOAK WITH THE GRIMMSPEED TURBO HEAT SHIELD! The turbocharger is one of the hottest components in your engine bay and can have some re...

The ALL NEW GrimmSpeed Transmission Mounts are designed to lock down your Subaru's drivetrain and enhance the driving experience, while keeping cab...

ENHANCE INTERIOR Enhance the look of the interior with perfectly fitted dry carbon overlays. Using various methods of extensive testing for eac...

ENHANCE INTERIOR Enhance the look of the interior with perfectly fitted dry carbon overlays. Using various methods of extensive testing for eac...

DESCRIPTION This is the GrimmSpeed Pitch Stop Mount. This pitch stop mount is a dramatic improvement over the factory mount which is made from flex...

DESCRIPTION The GrimmSpeed Race Version Pitch Stop Mount And Bushing Kit is a pivotal component in the engine/drivetrain support department especia...

DESCRIPTION Clean up that engine bay and show your GrimmSpeed pride with our newly-designed Subaru Battery Tiedown. Laser cut, then CNC bent and po...

DESCRIPTION Here, you are looking at the GrimmSpeed Lightweight Battery Tiedown. This is a great way to improve the looks and aesthetics of your en...

Replace the ugly yellow plastic OEM oil fill cap with the sexy billet aluminum PERRIN Oil Fill Cap! Complete Your Engine Bay The Perrin Aluminum O...

Replace the ugly yellow plastic OEM oil fill cap with the sexy billet aluminum PERRIN Oil Fill Cap! Complete Your Engine Bay The Perrin Aluminum O...

Replace the ugly yellow plastic OEM oil fill cap with the sexy billet aluminum PERRIN Oil Fill Cap! Complete Your Engine Bay The Perrin Aluminum O...

Replace the ugly yellow plastic OEM oil fill cap with the sexy billet aluminum PERRIN Oil Fill Cap! Complete Your Engine Bay The Perrin Aluminum O...

Replace the ugly yellow plastic OEM oil fill cap with the sexy billet aluminum PERRIN Oil Fill Cap! Complete Your Engine Bay The Perrin Aluminum O...

DESCRIPTION The GrimmSpeed Air/Oil Separator for turbocharged Subaru models has a unique design that allows you to maintain your PCV Valve while se...

SuperPro control arms are an easy to install replacement/upgrade suspension part. Fixing many of the downfalls and issues associated with OE and ot...