GrimmSpeed

 Justin Grimm developed a passion for Subaru vehicles in 2002. He enjoyed taking them apart and improving their performance. After a few years of enjoying his passion for Subarus, he decided to make a career out of it. After realizing the niche market for aftermarket performance products, he founded GrimmSpeed out of his garage. He then later opened up his shop in St. Paul, MN where today the company produces innovative products for other nationwide Subaru enthusiasts.

An External Wastegate (EWG) allows exhaust gases to be diverted prior to GrimmSpeed Subaru WRX STi LGT FXT...
GrimmSpeed™ OEM Style Gasket, OEM quality without the high OEM price. At GrimmSpeed™ we have worked with endless...
An amazing 7 LAYERS! GrimmSpeed™ OEM Style Gasket, OEM quality without the high OEM price. At GrimmSpeed™ we...
The GrimmSpeed Electronic Boost Control Solenoid is designed to work with your factory computer (requires tuning). It will...
Design requirements for this intake were simple: The intake must not only be safe for the engine, but...
One-Piece Aluminum Casting - Precise fit and smooth flow without distortion Thick Flanges - Prevent heat and vibration...
GrimmSpeed™ does it again! Introducting our enlarged bore Intake Manifold to TGV gaskets. Why do you want the...
The GrimmSpeed Electronic Boost Control Solenoid is designed to work with your factory computer (requires tuning). It will...
Tired of the endless searching for a 3" 2 Bolt premium gasket that doesn't blow out? Most aftermarket...
Rounding out our Top Mount Intercooler offerings is this model, designed specifically for the 2015+ Subaru WRX. We...
The GrimmSpeed Charge Pipe kit replaces the restrictive plastic stock unit on the FA20 powered WRX with larger...
High-quality replacement TMIC y-pipe hoses. Is your old 90 degree TMIC coupler all chewed up from years of...
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