G Brand Collection

GFB's Short Shift kits are like no other. Until you feel the action of one for yourself, you won t believe the difference! Why did we bother to ma...

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

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 ...

Better Flow, More Power! At GrimmSpeed we know that not everyone is ready for one of our full aftermarket intake systems, but still wants a safe an...

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...

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...

Grams Performance is proud to offer the most innovative high-performance fuel injectors for today’s performance vehicles. Premium materials, adva...

The Gfb Vag Mk5/6 Boost Gauge Tap Provides A Neat & Easy Manifold Pressure Reference Port For 2.0 Tsi/fsi Engines. 10 second installation! Sin...

On the surface it may look like just another dual-port blow-off valve, but the Respons is actually much more than that. Featuring GFB's patented v...

On the surface it may look like just another dual-port blow-off valve,but the Respons is actually much more than that. Featuring GFB's patented ven...

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...

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 ...

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...

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...

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

Suits Wastegates 38 (7003) & 44 (7002) 7 psi middle spring

The Hybrid Is Back! Celebrating 20 Years Since the World’s First Dual Outlet Blow-Off Valve In a time before Justin Bieber, Y2K, and even Google, t...

Goodridge Braided Brake Line Kit - DA Integra Goodridge brake line kits are manufactured, constructed and tested entirely in the UK. This gives yo...

Grams Performance offers innovative, high-performance fuel injectors for today's vehicles. Designed to provide enhanced fuel flow and maximum power...

Introducing The New DV+ For 1.4 TSI Twin Charged Engines! GFB’s DV+ Solution Couldn’t Be Simpler – Keep What Works And Replace What Doesn’t. Worldw...

The Simple & Essential Mod For 30% Quicker Boost By retaining the factory ECU control and recirculating the vented air, the DV+ T9354 is a pure...

The Hybrid Is Back! Celebrating 20 Years Since the World’s First Dual Outlet Blow-Off Valve In a time before Justin Bieber, Y2K, and even Google, t...

Represent in style! Perfect Slim Fit! Mounts to drilled USDM-spaced license plate holes - (or molded JDM holes for the 15+WRX/STI) Black powderco...

Looking for something extra to spruce up your engine bay? Clean up that engine bay and show your GrimmSpeed pride with our newly-designed Subaru Ba...

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...

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...

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

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...

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...

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

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 ...

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...

The DV+ options for VW and Audi models!  The T9380 is the latest addition to the DV+ range of diverter valves from GFB (Go Fast Bits). It is specif...

Suits Wastegates 38 (7003) & 44 (7002) 5 psi spring

The Hybrid Is Back! Celebrating 20 Years Since the World’s First Dual Outlet Blow-Off Valve In a time before Justin Bieber, Y2K, and even Google, t...

GO FAST BITS FX-R FUEL PRESSURE REGULATOR FEATURES: 2x -6AN inlet port, 2x 1/8” NPT pressure gauge/sensor ports, and 1x -6AN return port ...

GFB have re-designed the WRX lightweight pulley to provide even more benefits. It is now shaped to look exactly like the factory Subaru pulley, so...

The simple & essential mod for 30% quicker boost! Using GFB’s TMS technology the Mach 2 can help return the engine to peak boost up to 30% fast...

From Grimmspeed themselves! - For years you've been asking us for intakes, and for years we've silently worked to create a solution that sets itsel...

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...

Finally a GD intake with the looks to match its performance. It’s no secret that GrimmSpeed intakes feature performance and aesthetics that lead t...