GrimmSpeed

GrimmSpeed V2 Bypass Valve 2015-2021 Subaru WRX CHANGES MADE IN THE V2 BPV: Removed the inspection port which was primarily used for quality cont...

GrimmSpeed V2 Bypass Valve 2004-2021 Subaru STI / 2002-2007 Subaru WRX CHANGES MADE IN THE V2 BPV: Removed the inspection port which was primarily...

At GrimmSpeed we know that not everyone is ready for one of our full aftermarket intake systems, but still wants a safe and easy way to increase po...

One of the biggest complaints we’ve heard from 2015-21 WRX owners has to do with cracks forming in their OEM plastic turbo inlets from removal, ins...

GrimmSpeed™ OEM Style Gasket, OEM quality without the high OEM price.At GrimmSpeed™ we have worked with endless amounts of aftermarket gaskets, non...

The turbo studs on the FA turbo motors are notoriously difficult to deal with. If you're lucky enough to get the nuts off without drama originally,...

An Elegantly-Engineered Solution. If you've been in the Subaru game for long, you're probably well aware that a 3-port Electronic Boost Control Sol...

Most adjustability available on the market! Mounts in OEM tow hook location (No cutting or drilling required) Simple stainless steel allen key ha...

Perfect size and weight for the perfect shift, every time. The standard GrimmSpeed Shift Knob is one of the most popular in the Subaru aftermarket ...

The GrimmSpeed Charge Pipe Kit replaces the restrictive stock plastic unit on the FA20-powered WRX with larger diameter CNC mandrel bent aluminum t...

The Original Direct-Fit BCS for turbo Subarus. GrimmSpeed is proud to provide the most complete and easy to use 3-Port Electronic Boost Solenoid fo...

Exhaust leaks seem to be an all-too-common issue with most modded Subarus. They tend to spring up out of nowhere and cause hours of troubleshooting...

The GrimmSpeed Alternator/Pulley Covers, Fender Shrouds and Radiator Shrouds are NOW available in our all new neon green color option, both individ...

Replace your worn or leaking OEM donut gasket with this fiber-reinforced graphite donut gasket at a fraction of the cost.

Looking for a GrimmSpeed JPipe that is in stock?  GrimmSpeed Catted JPipe 2015-2021 WRX   GESI Catalytic Converter - Comes as standard in all V2 J...

GrimmSpeed OEM Style Gasket, better than OEM at an attractive price. Tired of the endless searching for a 3" 2 Bolt premium gasket that doesn't blo...

Inspiration for the StealthBox Intake came from internal discussions about what we wanted from an intake system for the 2015+ WRX. Of course perfor...

Innovative Turbo Flange Design - 1/2" thick while retaining all OEM brackets One-Piece Tube - Ensures exact fitment, robust construction and ease ...

Stage 2 Package Components GrimmSpeed 3-Port Electronic Boost Control Solenoid GrimmSpeed StealthBox Cold Air Intake System GrimmSpeed Catted J-Pi...

Special Fitment Note: Supported fitments include only those vehicles running OEM STI and GrimmSpeed Top Mount Intercoolers. The elbow coupler is si...

Over the years, GrimmSpeed Engineers have proven that we are capable of manufacturing the highest quality, best performing exhaust components for t...

The long-awaited GrimmSpeed Bypass Valves are here! Our passion for building the most robust, best-performing parts on the market has driven us to ...

We all know how bad (and expensive!) the OEM Subaru Top Mount Intercooler Gaskets can be. They are one of the greatest source of leaks in the entir...

Flared Adapter Transition!(Creates a smooth transition from your 3" downpipe to your OEM midpipe) Flanged for OEM Donut Gasket Indestructible...

Just because an existing GrimmSpeed Product is one of the best performing, highest quality, fan-favorite parts in the industry, doesn't mean there ...

Inspiration for the StealthBox Intake came from internal discussions about what we wanted from an intake system for the 2015+ WRX. Of course perfor...

Adding a well-design, well-built aftermarket up pipe is one of the first things you should do to your Subaru. Our ultimate goal was to make the bes...

You've been asking for this bad sally for a while and it's finally here. The intake the for the 15+ STI can be thought of as a hybrid of the tube a...

So, you probably already know that you want an intercooler with maximum cooling and minimum restriction, but when it comes to selecting the right o...

The only High-Lift Hood Struts designed for the VA WRX/STI and VB WRX! Let’s face it - the OEM hood struts on the 15+ WRX/STI are an awesome featur...

An Air/Oil Separator has one job, remove the oil from the engine ventilation system so the oil does not get sent through the intake system.  The Gr...

At GrimmSpeed™ we have worked with endless amounts of aftermarket gaskets, none seem to work as well as the multi-layer steel OEM style gaskets. Th...

GrimmSpeed OEM Style Gasket, better than OEM quality at an attractive price.At GrimmSpeed we have worked with endless amounts of aftermarket gasket...

Adding a well-design, well-built aftermarket up pipe is one of the first things you should do to your Subaru. Our ultimate goal was to make the bes...

The GrimmSpeed Turbocharger Program started by recognizing a need in the market for a robust, quick-spooling and high-performing turbo. Design bega...

With so many catback options available, our goal was to create a unique, refined sound in an extremely high quality system. We've been casually ref...