WRX STI

If you upgrade your Subaru to a Blow-Through System you will need a way to block off the location where the old MAF Sensor was. The GrimmSpeed M...

  Do you know what your intake manifold sits on?...a superheated boxer engine. If you don't know already, the cooler your intake air is the more H...

Do you know what your intake manifold sits on?...a superheated boxer engine. If you don't know already, the cooler your intake air is the more HP ...

The factory pitch stop mount is often overlooked and leaves a lot of room for improvement, both in performance and aesthetics. The OEM piece is ma...

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 ...

The factory pitch stop mount is often overlooked and leaves a lot of room for improvement, both in performance and aesthetics. The OEM piece is ma...

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...

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...

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...

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...

Spruce up your engine bay and make it stand out! At GrimmSpeed, we pride ourselves in the design of our aesthetic pieces just as much as our per...

3 problems. 1 clever solution. Innovative Integrated Tool Tray! Keeps Radiator Running Cooler(directs air through radiator) Built In Radiator S...

3 PROBLEMS. 1 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. Finall...

GrimmSpeed Subaru Front Mount Intercooler "STI-Style" Turbo Outlet Hose 08-14 WRX Adapt your GrimmSpeed 2008-14 WRX Front Mount Intercooler for ...

The bar has been raised. So, you probably already know that you want an intercooler with maximum cooling and minimum restriction, but when it come...

High-quality replacement TMIC Y-Pipe Hoses.  Special Fitment Note: Supported fitments include only those vehicles running OEM STI and GrimmSpeed T...

OEM Splitter choking your TMIC? We can fix that. These have both been a long time in the making and as the popularity of GrimmSpeed intercooler off...

OEM Splitter choking your TMIC? Fix that. These have both been a long time in the making and as the popularity of GrimmSpeed intercooler offerings ...

OEM Splitter choking your TMIC? Fix that. Tired of popping your hood only to have that ugly OEM Splitter remind you of how badly it deprives your f...

High-quality replacement TMIC Y-Pipe Kit.  Special Fitment Note: Supported fitments include only those vehicles running OEM STI and GrimmSpeed Top...

7 STAINLESS STEEL LAYERS GrimmSpeed OEM Style Gasket, OEM quality without the high OEM price.At GrimmSpeed we have worked with endless amounts of a...

Minimize Heat Soak with the ALL NEW Turbo Heat Shield! The turbocharger is one of the hottest components in your engine bay and can have some real...

Minimize Heat Soak with the ALL NEW Turbo Heat Shield! The turbocharger is one of the hottest components in your engine bay and can have some real...

The internal wastegate(IWG) bracket is used in place of the stock wastegate actuator when moving to an external wastegate setup. In the previous ye...

HEL Brake Lines eliminate the risk of unreliable brakes, giving you premium quality brake performance at the same time. Incredible value for money...

*sold individually*HKS / Blitz / Apexi / Stri 02-07 WRX/STi TT FT-3 Harness

*sold individually*HKS / Blitz / Apexi / Stri 08+ WRX/STi TT Harness FT-6

*sold individually*HKS 02-07 WRX / 04-07 STi Carbon Ti Exhaust

*sold individually*HKS 02-07 WRX / 04-07 STi Hiper Exhaust

*sold individually*HKS 02-07 WRX / 04-07 STi Sport Exhaust

*sold individually*HKS 02-07 WRX/ 04-07 STi SSQV4 BOV Kit

*sold individually* HKS 02-08 WRX / 04-08 STi EJ20/25 Upgraded Timing Belt

*sold individually*Single Plate Clutch Kit that includes Clutch Disc, Cover, Flywheel for up to 450ps. "MG Composite Disc" eliminates uncomfortable...

*sold individually*HKS 08 Subaru Impreza WRX STi SSQV Recirculation Kit for hks71007-AF013

*sold individually* Dimension: Stock air element part # 16546-AA090 16546-AA120 Replacement filter M2 size (70017-AK104) Package size...

*sold individually*HKS 11 Subaru Impreza WRX/STi Sedan SUS304 ES Premium Exhaust

*sold individually* You can have the great performance and great muffler sound of the isometric layout by changing exhaust manifold only with ...

*sold individually* HKS Hi-Power Muffler WRX STI/WRX 2015 US

*sold individually*About HKS muffler: About center pipe Diameter of center pipe is the portion that has the largest diameter. (Excluding silencer ...

*sold individually*HKS Max 4 SP WRX STI Full Kit

*sold individually*HKS Racing Muffler WRX STI Sedan 11-14 USACert. No. Vehicle IMPREZA Model GV Engine EJ25(TURBO) Model Year 07/** -...

*sold individually* Features: The pickup will be better before and after the intercept so the mid RPM range response is good and start smoothly....

*sold individually*HKS 02-08 WRX / 04-07 STi Uppipe

*sold individually*HKS Super Turbo Muffler Ti Subaru VAB WRX STI/VAG WRX S4

The ID1050x is the evolution of the ID1000, and the latest addition to the X-Series. It is the most recent offering from the partnership of Injecto...

If performance is what you are seeking, the Invidia G200 Exhaust Delivers. Each G200 Exhaust features a super-strength titanium tip with an expa...

For a good balance of price and performance, Invidia offers the motorsport enthusiasts a strong line-up of Invidia N1 Exhausts. Each Invidia Exh...

For a good balance of price and performance, Invidia offers the motorsport enthusiasts a strong line-up of Invidia N1 Exhausts. Each Invidia Exh...