GrimmSpeed

These puppies are loud. You're on this page because you know that and want that. We have them. Simple, right? You know the drill Extremely Loud 11...

The  MOST COMPLETE AND BEST PERFORMING MazdaSpeed BCS Ever Built, Period. Get into Boost Much Quicker(Flows 10% more than competition) P...

The Most COMPLETE EVO BCS Ever Built, Period. Get into Boost Much Quicker(Flows 10% more than the competition) Plug and Play into OEM Ha...

Meticulous engineering meets elegant design. For years you've been asking us for intakes, and for years we've silently worked to create a solution ...

GrimmSpeed does it again with our enlarged bore Intake Manifold-To-TGV Gaskets. Why do you want the enlarged bore style vs. the small oem?...the oe...

ENGINEERED TO PERFECTION. Tired of being teased for your corroded alternator and boring engine bay? Step your Alternator Cover game up; GrimmSpeed ...

One bracket to rule them all. Fits ALL US WRX and STI Models - 2002-2016 fitments confirmed Extremely Adjustable - Mount them wide, tight, high,...

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

No more welding turbos! The internal wastegate(IWG) bracket is used in place of the stock wastegate actuator when moving to an external wastegate ...

  License plates are a necessary evil on the front of our cars, but you can save your front bumper from looking boring or blocking flow to your FMI...

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...

 The  Most Complete and Best Performing MazdaSpeed BCS Ever Built, Period. Get into Boost Much Quicker(Flows 10% more than the competition...

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...

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 ...

When it comes to wiring the Hella Horns that are mounted to your beautiful GrimmSpeed BroTie Bracket, we have you covered. Don’t stress yourself wi...

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

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

Design requirements for this intake were simple: The intake must not only be safe for the engine, but perform well both with and without tuning. Th...

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 best hood struts, designed just for your BRZ/FRS/86.  Tired of that ugly OEM hood prop blocking your view of that beautiful FA20 boxer engine?...

GrimmSpeed™ OEM Style Gasket, OEM quality without the high OEM price.FINALLY you have an option for an extra thick Exhaust Manifold to Up Pipe Gask...

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...

When it comes to wiring the Hella Horns mounted to your beautiful GrimmSpeed BroTie Bracket, we have you covered. Don’t stress yourself with trying...

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

Now available for Subaru Impreza models from 1996-2008. The Antenna Delete Plate is made from black powder-coated aluminum that is fade-resistant t...

License plates are a necessary evil on the front of our cars, but you can save your front bumper from looking boring or blocking flow to your FMIC...

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 answer to the antique Subaru pulley removal tool, bolts stuck through boards, and random screws welded to bars. Our tool was engin...

GrimmSpeed OEM Style Gasket, OEM quality without the high OEM price.At GrimmSpeed we have worked with endless amounts of aftermarket gaskets, none ...

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

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...

A full External Wastegate (EWG) set-up consists of a EWG up-pipe and a wastegate. The EWG set-up creates better turbo spool because it can utilize ...

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

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...

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...

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...

INSTALL YOUR AFTERMARKET CATBACK THE RIGHT WAY! Exhaust leaks seem to be an all-too-common issue with most modded Subarus. They tend to spring up ...

GrimmSpeed Drive By Cable Throttle Body Gasket for Subaru vehicles is here!

High-Lift Hood Struts. There is no substitute.  Tired of that ugly OEM hood prop blocking your view of that beautiful boxer engine? Always wanted...

No more TMIC Inlet Leaks!   We all know how bad the OEM Subaru Top Mount Intercooler Gaskets are. They are the greatest source of leaks in ...

The GrimmSpeed shift boot retainer will hold your shift boot in place around the base of the shift knob. This is meant for Subaru 5spd owners that ...

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...

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

Tired of being teased for your boring engine bay? Did you replace your stock TMIC with one that doesn't facilitate the use of the stock engine cove...