GrimmSpeed

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 ...

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 ...

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...

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

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,...

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

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

GESI Catalytic Converter - Comes as standard in all V2 J-Pipes 304 Stainless Steel Construction - Using the BEST materials in the industry Thick 1...

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...

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...

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...

Proudly made in the USA - Design, Materials and Fabrication Innovative 3-D Contour Flange (Limited models only) FARO™ Arm Designed - We are at ...

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...

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

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...

The beauty of the GrimmSpeed Staged Power Packages is that all of the included components were designed and tested to work well together as a compl...

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 ...

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...

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...

GrimmSpeed™ knows that many of you replace all of your exhaust gasket at the same time while installing aftermarket exhaust parts on your car. We'v...

Set of GrimmSpeed TGV to Engine Gaskets. We recommend replacing these any time you pull your TGVs off. These come as a pair, pick up an additional ...

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 ...

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

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

As with other FMIC kits, the GrimmSpeed Front Mount Intercooler requires the removal of your factory bumper beam in order to fit its massive core. ...

These have both been a long time in the making and as the popularity of GrimmSpeed intercooler offerings has skyrocketed, we've had a massive amoun...

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...

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

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