G Brand Collection

Part Number: 077044Kill that exhaust leak for GOOD!GrimmSpeed Subaru 3 in. Downpipe AdpaterFlared Adapter Transition! (Creates a smooth transition ...

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...

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

Perfect size and weight for the perfect shift, every time. The GrimmSpeed Stubby Knobs are for car enthusiasts that prefer a shift knob that's o...

A simple way to clean your bay. Simplify your 2015-17 STI engine bay with The GrimmSpeed Sound Generator Plug Kit. The stock sound generator is ...

Add a touch of class to your bay! Some OE parts look passable and others miss the mark. In the case of the factory post MAF hose, the quicker you ...

Out with the old, in with the new!     These bushing kits were created to be a replacement or upgrade for your GrimmSpeed Pitch Stop Mount. The...

SEAL the deal with a set of GrimmSpeed FA20 Head Gaskets! GrimmSpeed has set the standard for quality when it comes to aftermarket replacement gask...

GrimmSpeed Subaru Front Mount Intercooler "STI-Style" Turbo Outlet Hose 08-14 WRX Adapt your GrimmSpeed 2008-14 WRX Front Mount Intercooler for ...

Meticulous Engineering, Unparalleled Craftsmanship GrimmSpeed Intercoolers have set the gold standard of how a high performance heat exchanger shou...

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...