2015-2021 Subaru STI Engine

DESCRIPTION The GrimmSpeed V2 Bypass Valve received many upgrades such as a redesigned the internal piston to eliminate the potential failure point...

DESCRIPTION The MSP Front Brace Bar is engineered to provide a bold, aggressive look and increased chassis rigidity for your 2015-2021 WRX/STI. It ...

DESCRIPTION The GrimmSpeed Dry-Con Air Filter is a high-performance direct-OEM replacement panel filter that has been designed to flow more air whi...

The IAG Performance V3 Street Series Air / Oil separator (AOS) is an excellent investment to keep your Subaru vehicle running well. The Street Seri...

DESCRIPTION Add a little style to your hood struts by swapping them for these OLM Carbon Fiber Hood Struts. This piece offers the same OE style and...

This kit is designed to provide a way to data log and monitor the ethanol content of fuel on most new Subaru Vehicles. Our proprietary controller r...

PLM Private Label Mfg. Power Driven Subaru EWG Up-Pipe with Dump Tube 38mm features a unique designed up pipe which gives you the option to install...

DESCRIPTION The Chase JB400 Turbo is the smaller of our two offerings, this journal bearing unit is a perfect bolt-on to any stage 3 car. The Chase...

DESCRIPTION The GrimmSpeed Electronic Boost Control Solenoid is one of GrimmSpeed's most utilized upgrades due to the durability, simplicity of use...

DESCRIPTION GrimmSpeed's new Overtake BB500 Turbocharger is another powerful turbocharger designed by GrimmSpeed. The Overtake Ball-Bearing 500-Ser...

The flow of air is not only limited to the outside of a car. To maximize cooling capabilities, a radiator needs a direct flow of air to allow an en...

DESCRIPTION The biggest issue with the OEM struts that they prevent your hood from opening far enough to allow adequate space for working and light...

DESCRIPTION The Grimmspeed Top Mount Intercooler Y-Pipe Kit has been designed to work with factory or aftermarket top mount intercoolers. This is a...

Here are the details: 1050Xcc Injector model Compact body Improved internal flow path increases output by 5% without sacrificing low flow performan...

DESCRIPTION This is the GrimmSpeed Top Mount Intercooler. Once you start performing modifications that add more horsepower and more boost, eventual...

The COBB Subaru Pitch Stop Mount is constructed of CNC machined 6061-T6 aluminum and finished with black anodizing. The COBB logo is laser engrav...

1300cc injector size Top-feed type Designed in partnership with Bosch Motorsport Designed to work with alternative fuels All stainless internals C...

The COBB Redline Carbon Fiber Fuse Cover for the 2008-2021 Subaru WRX/STI is constructed of solid carbon fiber featuring a 2x2 twill weave p...

DESCRIPTION We know that many of you replace all of your exhaust gasket at the same time while installing aftermarket exhaust parts on your car. We...

6A1 540 A * Type 1 Aluminum Oval shape * Steel Blue Bracket Light weight aluminum oval shaft, strong & durable.

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

COMPLETE THE LOOK Matching Perrin's signature pulley cover design, the angled cutouts look great while concealing the factory fender gap.  DESIGN P...

This is the factory spark plug as installed in the 2018 Subaru WRX STI Type RA and 2019 Subaru WRX STI. The main differences are a heat range tha...

EMISSIONS This part is in the process of external testing with the EO process ongoing. NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY EMISSION CO...

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 ...

The PERRIN Master Cylinder Brace prevents unwanted movement of the master cylinder, allowing for increased brake pedal stiffness and response. REDU...

Tired of heat soak? We don't blame you!   It's time to upgrade to an intercooler that is designed specifically for the 2015+ WRX with performance i...

Dress up your engine bay while preventing leaks and spills from your master cylinder reservoir with the PERRIN Brake Reservoir Cozy.  Easy Installa...

PLM Power Driven Subaru 44mm EWG Up-Pipe with Dump Tube features a unique designed Up-pipe which gives you the option to install a 44mm or 45mm ext...

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...

The Process West range billet manifolds is a no holds barred manifestation of what is possible under the hood of a WRX/STI when perfect aesthetics ...

DESCRIPTION Setting the standard for MAF style intakes with a velocity stack, airflow straighteners and composite body for ultimate performa...