GrimmSpeed

Aftermarket exhaust systems are often of a larger tubing diameter than factory systems and as a result, are a tighter fit below your car. With fact...

Aftermarket exhaust systems are often of a larger tubing diameter than factory systems and as a result, are a tighter fit below your car. With fact...

If you've dealt with sourcing exhaust gaskets before, you know that there are a lot of different options at a lot of different price points. Unfort...

Rejoice APS Downpipe owners, you finally have a great replacement gasket for your APS Downpipe! We know that you have frequent blowouts so we have ...

Rejoice 3-Bolt Up Pipe owners, you finally have a great replacement gasket for your up pipes! We listened to your wants and made it happen.GrimmSpe...

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

GrimmSpeed introduces the most complete and easy to use 3-Port Electronic Boost Solenoid available on the market. Our aftermarket boost controller ...

GrimmSpeed is proud to provide the most complete and easy to use 3-Port Electronic Boost Solenoid for available for all turbo Subarus. Unlike your ...

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...

GrimmSpeed is proud to provide the most complete and easy to use 3-Port Electronic Boost Solenoid for available for all turbo Subarus. Unlike your ...

The 2015-2021 WRX offers a unique change of pace, as the factory 2-port solenoid is mounted directly to the plastic turbo inlet and interfaces with...

This intake filter is dimensionally identical to our oiled air filters that are included with the GrimmSpeed WRX/STI/BRZ/FRS/LGT intakes. This filt...

GrimmSpeed™ introduces their premium quality 38mm 2-Bolt Flange External Wastegate Gasket(EWG). This gasket is for use in any 38mm size EWG setup. ...

100% Thicker than OEM Gaskets!!2X Thick 3" 2-Bolt gasket is hands down the most beefy 3" 2-Bolt gasket on the market. 12 LAYERS!Tired of the endles...

Tired of the endless searching for a 3" 2 Bolt premium gasket that doesn't blow out? Most aftermarket Subaru exhaust systems need a 3" 2 bolt gaske...

A Heavy Duty Multi-Layer T3 Gasket with ALL Stainless Layers and Fire-Ring If you've dealt with sourcing turbo manifold gaskets before, you know th...

A Heavy Duty Multi-Layer T3 Gasket with ALL Stainless Layers and Fire-Ring If you've dealt with sourcing turbo manifold gaskets before, you know th...

A Heavy Duty Multi-Layer T4 Gasket with ALL Stainless Layers and Fire-Ring If you've dealt with sourcing turbo manifold gaskets before, you know th...

The GrimmSpeed Stubby Knobs are for car enthusiasts that prefer a shift knob that's on the short and fat side, based off the design of the original...

The GrimmSpeed Stubby Knobs are for car enthusiasts that prefer a shift knob that's on the short and fat side, based off the design of the original...

These shift knobs are designed to fit the 6 speed right out of the box. Each knob is machined from Delrin/Duracon, an extremely durable thermoplast...

These shift knobs are designed to fit the 6speed right out of the box. Each knob is machined from solid 304 stainless steel rod and weighs in at 67...

GrimmSpeed has a unique design which allows you to keep your PCV valve while separating the oil out of the crankcase and head ventilation air. None...

GrimmSpeed has a unique design which allows you to keep your PCV valve while separating the oil out of the crankcase and head ventilation air. None...

GrimmSpeed has a unique design which allows you to keep your PCV valve while separating the oil out of the crankcase and head ventilation air. None...

GrimmSpeed has a unique design which allows you to keep your PCV valve while separating the oil out of the crankcase and head ventilation air. None...

GrimmSpeed has a unique design which allows you to keep your PCV valve while separating the oil out of the crankcase and head ventilation air. None...

GrimmSpeed has a unique design which allows you to keep your PCV valve while separating the oil out of the crankcase and head ventilation air. None...

The Grimmspeed aluminum alternator cover for the Subaru WRX and STI replaces the ugly factory cover in your choice of Red, Silver and Black. Laser ...

The Grimmspeed aluminum alternator cover for the Subaru WRX and STI replaces the ugly factory cover in your choice of Red, Silver and Black. Laser ...

The Antenna Delete Plate is made from black powder-coated aluminum that is fade-resistant to the sun. Installation is easy and the end result appea...

The WRX offers a unique change of pace, as the factory 2-port solenoid is mounted directly to the plastic turbo inlet and interfaces with an o-ring...

GrimmSpeed BroTie mounting bracket for Hella Horns and other accessories. GrimmSpeed engineers overlaid 3D scans of GD, GR and VA chassis core sup...

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

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

Real 10whp gains in 30min with no tuning. Design requirements for this intake were simple: The intake must not only be safe for the engine, but per...

Real 10whp gains in 30min with no tuning. Design requirements for this intake were simple: The intake must not only be safe for the engine, but per...

The design requirements for this intake are similar to our others: the intake should reduce as much restriction as possible, it should be easy to t...

Based on our testing and research, design requirements for this intake became simple. The MAF sensor must be protected from the heat of the engine ...

The design requirements for this intake are similar to our others: the intake should reduce as much restriction as possible, it should be easy to t...

Based on our testing and research, design requirements for this intake became simple. The MAF sensor must be protected from the heat of the engine ...

GrimmSpeed™ OEM Style Gasket, OEM quality without the high OEM price. At GrimmSpeed™ we have worked with endless amounts of aftermarket gaskets, no...

GrimmSpeed™ OEM Style Gasket, OEM quality without the high OEM price. At GrimmSpeed™ we have worked with endless amounts of aftermarket gaskets, no...

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

Do away with the flimsy, boring factory fabric shrouds and make your engine bay stand out with the BRAND NEW GrimmSpeed Fender Shrouds for the 2...

Do away with the flimsy, boring factory fabric shrouds and make your engine bay stand out with the BRAND NEW GrimmSpeed Fender Shrouds for the 2...

GrimmSpeed intercoolers have set the gold standard of how a high-performance heat exchanger should be crafted. These intercoolers have always maint...

GrimmSpeed intercoolers have set the gold standard of how a high-performance heat exchanger should be crafted. These intercoolers have always maint...