2015-2021 Subaru STI Engine

DESCRIPTION These are the GrimmSpeed TGV to Engine Gaskets. If you need to replace your OEM gaskets, then the GrimmSpeed units make for a quality r...

The IAG Performance PTFE Engine Bay Flex Fuel Kit for the 2008-21 Subaru STI combines our popular PTFE Flex Fuel Line kit with IAG Top Feed Fuel Ra...

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...

These are the Injector Dynamics 1750cc Fuel Injectors and are an excellent option for the 2002-2014 Subaru WRX and 2007-2021 STI that needs to supp...

Draw from our success of the PLM strut tower bar for Honda models, we are pleased to offer our strut tower brace for Subaru WRX & STI. Made fr...

This is handmade here in the USA at Extreme Turbo Systems. This will bolt up with a 3.0"-4.0" ETS intercooler and requires no additional trimming o...

This piping kit is the best on the market for relocating the factory Subaru intercooler. The factory intercooler location allows for excessive heat...

DESCRIPTION Replace your missing or damaged up-pipe hardware with the same high-quality kit included in all GrimmSpeed Up-Pipes. Designed for durab...

EMISSIONS 50 State Legal. This part is legal for sale and use on Emissions Controlled Vehicles in all 50 states when used in accordance with the ...

DESCRIPTION To help keep chassis deflection at bay and to keep any large dents out of your front fascia we’re offering the GrimmSpeed Bumper Bar as...

OVERVIEW Cover up the lackluster plastic caps that come on your factory WRX/STI (VA/GR/GV) with a cap machined from solid aluminum.  The caps a...

EMISSIONS 50 State Legal. This part is legal for sale and use on Emissions Controlled Vehicles in all 50 states when used in accordance with the ...

A quality product with easy installation! This COBB radiator shroud and alternator cover will not only dress up your engine bay but also help dir...

The COBB Turbo Blanket is designed to limit the amount of heat that is transferred from your turbocharger to your engine bay as well as keeping h...

EMISSIONS This part is not an emissions-related part and therefore can be used on Emission Controlled Vehicles. DESCRIPTION The COBB Turbo ...

EMISSIONS This part is not an emissions-related part and therefore can be used on Emission Controlled Vehicles. DESCRIPTION Replace your ol...

DESCRIPTION Remove the overworked factory intercooler from your 2015+ STI in favor of the Black COBB Front Mount Intercooler Kit. Featuring a ...

EMISSIONS This part is not an emissions-related part and therefore can be used on Emission Controlled Vehicles. DESCRIPTION This radiator s...

The PERRIN Radiator Shroud caps the top of the radiator for a sleek, clean, and accented new look. DESIGN Dress up the top of your radiator with t...

Performance During cornering, the Perrin Strut Tower Brace improves chassis rigidity, enhances steering precision under high load conditions, and r...

Best TMIC on the market! Extreme Turbo Systems has designed a direct bolt on top mount intercooler for the 08-21 Subaru STI. This intercooler featu...

The ETS Cold Air Intake locates the filter in the fender well out of the engine bay. This makes for not only the coldest air possible but the most ...

DESCRIPTION The OLM LE Dry Carbon Fiber Fuse Box Cover was hand crafted with great attention to detail. Each piece is cared for and goes through a ...

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 ...

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...

DESCRIPTION The Perrin TMIC is 12% larger than the nearest competitor's core. The large core means less restriction and better cooling capabilities...

DESCRIPTION Under hard acceleration, the drivetrain is being twisted front-to-back from the front axle torque twist. To control this front-to-back ...

DESCRIPTION This replacement filter can be used for the 2015-2021 STI redline carbon fiber intake. WHY? The filter element that originally...