GrimmSpeed

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 ...

With so many catback exhaust options available, our goal was to create a unique, refined sound in an extremely high-quality hand-welded system. We'...

Dress to impress! GrimmSpeed engine dress-up pieces have been extremely popular with Subaru owners over the years, but there’s always been one sma...

The WHOLE Package! GrimmSpeed knows that many of you replace all of your exhaust gasket at the same time while installing aftermarket exhaust part...

Meticulous Engineering Meets Unparalleled Craftsmanship. You probably already know that you want an intercooler with maximum cooling and minimum r...

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

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

Installation Note - Take care to install the air filter onto the intake tube properly. Push the filter onto the tube no more than 1" before tighten...

Sharpen your handling and reduce NVH. Follow the development of the Strut Tower Brace here. You’ve probably read somewhere on the internet that a ...

ENGINEERED TO PERFECTION. Booya! Add a bit of style and function to your engine bay with this simple but elegant and first of it's kind pulley cove...

Now supporting the Evo community with the same top quality gaskets we have been offering Subaru owners for years! Mitsubishi Evolution X Intake Man...

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...

SEAL the deal with a set of GrimmSpeed EJ25 Head Gaskets! GrimmSpeed has set the standard for quality when it comes to aftermarket replacement gask...

GrimmSpeed 08-14 Subaru WRX STI Lightweight Battery Mount Kit GrimmSpeed has always been on the forefront of innovation when it comes to well-en...

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

Upgrade that ugly yellow OEM plastic oil cap! Kick out your old oil cap and tell it to hit the streets, we have a sleeker, much more attractive ver...

Your factory crank pulley is responsible for transferring energy from your crankshaft to your water pump, a/c compressor and alternator. It does th...

Welcome to the most refined manual boost controller available on the market today. During development, we worked hand in hand with tuners across th...

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...

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...

  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...

Meticulous Engineering, Unparalleled Craftsmanship Replace that undersized, plastic stock intercooler with a GrimmSpeed Top Mount Intercooler Kit, ...

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...

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...

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...

Our Stubby Delrin Shift Knob ($45) is perfect if you are looking for a more OEM shift feel but still want an upgraded look. Weighting in at just 1...

GrimmSpeed Intake Manifold to Head Gasket Pair for Phase 2 Subaru EJ Engines. Pick up a couple pairs of these to match up with your phenolic spa...

GrimmSpeed Intake Manifold to Head Gasket Pair. Pick up a couple sets of these to match up with your Phenolic Spacers; comes as a set of 2. Note...

GrimmSpeed Drive By Wire Throttle Body gasket for Subaru vehicles is here!

Now supporting the Evo community with the same top quality gaskets we have been offering Subaru owners for years! Mitsubishi Evolution 8 & 9 In...

Now supporting the Evo community with the same top quality gaskets we have been offering Subaru owners for years! Introducing the Mitsubishi Evolut...

Keep your head nice and toasty in a warm, comfortable GrimmSpeed knit beanie. • 60% cotton/40% acrylic. The perfect gift to the enthusiast in your ...

The exhaust manifold to turbo connection is one of the most important connections in the engine bay. This gasket is known to create leaking issues ...

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...

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...

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

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...

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

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...

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...

Hardcore heat cycles or repetitive removal can over time wear on the O-rings in the AOS. Maybe you like the peace of mind or have a show car you al...

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

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...

Tired of that ugly OEM hood prop blocking your view of that beautiful boxer engine? Always wanted to open your hood with just a couple fingers? ...

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...

Adding a heat shield to a turbo is a very effective way to reduce under hood temperatures and increase the efficiency of the intercooler. However,...