GrimmSpeed

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...

  In response to the demand to extend our Phenolic Spacer lineup to include some of the older subaru models, we now have created intake manifold t...

  In response to the demand to extend our Phenolic Spacer lineup to include some of the older subaru models, we now have created intake manifold t...

  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...

  In response to the demand to extend our Phenolic Spacer lineup to include some of the older subaru models, we now have created intake manifold t...

The bar has been raised. So, you probably already know that you want an intercooler with maximum cooling and minimum restriction, but when it come...

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...

1/2"+ Thick Flanges, 14 Gauge Tubing, TRIPLE Layer Flex Joint. We are DURABILITY. Up until now all of you 06-07 WRX and 04-08 FXT guys have been un...

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...

Meticulous engineering meets elegant design. With the 2015 J-Pipe, the devil is truly in the details and the product development team here at Grimm...

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'...

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

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...

Each knob is machined from Delrin/Duracon, an extremely durable thermoplastic, right here in Minnesota. Each knob weighs 120g, a fraction of it's ...

GrimmSpeed Intake Manifold to Head Gasket Pair for Phase 1 Subaru EJ Engines. Pick up a couple pairs of these to match up with your phenolic spa...

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...

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 ...

Downpipe suited to LHD models - can fit RHD with some modification. The beauty of the GrimmSpeed Staged Power Packages is that all of the included ...

Downpipe suited to LHD models - can fit RHD with some modification. The beauty of the GrimmSpeed Staged Power Packages is that all of the included ...

Downpipe suited to LHD models - can fit RHD with some modification. The beauty of the GrimmSpeed Stage Power Packages is that all of the included c...

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 ...

Downpipe suited to LHD models - can fit RHD with some modification.The beauty of the GrimmSpeed Staged Power Packages is that all of the included c...

Downpipe suited to LHD models - can fit RHD with some modification. The beauty of the GrimmSpeed Staged Power Packages is that all of the included ...

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...

Downpipe suited to LHD models - can fit RHD with some modification. The beauty of the GrimmSpeed Staged Power Packages is that all of the included ...

Downpipe suited to LHD models - can fit RHD with some modification. The beauty of the GrimmSpeed Staged Power Packages is that all of the included ...

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...

Downpipe suited to LHD models - can fit RHD with some modification. The beauty of the GrimmSpeed Staged Power Packages is that all of the included ...

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...

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 ...

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...