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.

Are you ready for fast spool-up and increased top-end power?An External Wastegate (EWG) allows exhaust gases to be...
7 STAINLESS STEEL LAYERS GrimmSpeed OEM Style Gasket, OEM quality without the high OEM price. At GrimmSpeed we have...
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 have worked...
Meticulous engineering meets elegant design. For years you've been asking us for intakes, and for years we've silently...
An elegantly engineered solution. Custom Machined Adapter - Makes use of the factory inlet recirculation port, instead of blocking...
Tired of the endless searching for a 3" 2 Bolt premium gasket that doesn't blow out? Most aftermarket...
GrimmSpeed™ does it again! Introducting our enlarged bore Intake Manifold to TGV gaskets. Why do you want the...
An amazing 7 LAYERS! GrimmSpeed™ OEM Style Gasket, OEM quality without the high OEM price. At GrimmSpeed™ we have worked...
The turbo studs on the FA turbo motors are notoriously difficult to deal with. If you're lucky enough...
Special Fitment Note: Supported fitments include only those vehicles running OEM STI and GrimmSpeed Top Mount Intercoolers. The...
Looking for something extra to spruce up your engine bay? Clean up that engine bay and show your...
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