2015-2021 Subaru STI

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

Here, you are looking at the Injector Dynamics ID2600-XDS Fuel Injectors. These have been designed to provide your fuel system with optimal flow, a...

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

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...

DESCRIPTION This is the Grimmspeed Splitter that is available for separate purchase. This particular splitter comes with the Grimmspeed Top Mount I...

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

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

DESCRIPTION These are the Grimmspeed Head to Exhaust Manifold Dual Port Gaskets. These particular gaskets see some of the highest temperatures when...

The Hyper V-Core Series is the newest to the Koyorad | Koyo All Aluminum Racing Radiator line up. An engine's cooling system in many newer vehicles...

DESCRIPTION With the removal and re-installation of intakes, and due to external weather and under hood temperatures, the factory O ring on the MAF...

DESCRIPTION The Faction Fab Billet Aluminum Pitch Stop features a unique design that eliminates front to back engine movement while eliminating the...

BLCDOM2.5XTR3IN This is the Blouch Dominator 2.5XT-R 10cm2 Turbocharger. This is a ball-bearing turbocharger that is capable of supporting up to ab...

BLCDOM5.0 The Blouch Dominator 5.0XT-R 10cm2 Turbocharger is rated to 650 HP for those with a built engine, good tune, and the right supporting fue...

BLCDOM3.0XTR This is the Blouch Dominator 3.0 XTR 10cm2 Turbocharger for the 02-07 Subaru WRX and 04+ STI. This is a ball-bearing turbocharger that...

BLCDOM1.5XT8CM2 This is the Blouch Dominator 1.5XT-R 8CM2 Turbocharger. This is a ball-bearing turbocharger that is capable of supporting up to abo...

BLCDOM2.5XTR8CM2 This is the Blouch Dominator 2.5 XT-R 8cm2 Turbocharger. This is a ball-bearing turbocharger that is capable of supporting up to a...

BLCDOM1.5XT This is the Blouch Dominator 1.5XT-R 10CM2 Turbocharger. This is a ball-bearing turbocharger that can support up to about 480 horsepowe...

Adjustable relief pressure and flow control makes fine-tuning on the fly simple and quick with the PERRIN BOV/BPV. HIGH FLOW With large 1.225" inle...

The PERRIN High Flow Washable Replacement Air Filter is the last filter you will ever need to buy. Not only is it washable, but it will increase ho...

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

Replacement Intercooler and Bumper Beam for the PERRIN Front Mount Intercooler Kits!

Don't leave your turbo uncovered! Protect your intercooler from radiant heat from your turbo with the PERRIN Turbo Heat Shield!

PERRIN Front Mount Intercooler Kits are ideal for those who want to get the most out of their turbocharged Subaru. Add power and a bold new look al...

SPECS: Capable of adding 15-30 WHP depending on tune and supporting modifications Intakes are constructed from aluminum tubing which is precision ...

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

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

Steel * Bolt on installation * Only for 6 Speed MT Protect Inner joint grease from high heat from muffler front pipe.

* Steel * Bolt on installation * Only for 6 Speed MT Protect Inner joint grease from high heat from muffler front pipe. 6A1 047 F