GrimmSpeed was founded in 2006 to provide customers with innovative and highly engineered aftermarket products. In short, they are a small group of highly dedicated car nuts who work in Minneapolis, Minnesota. Grimmspeed's bread and butter started out anything Subaru. However, after growing their team and engineering, they started developing products for Mitsubishi, MazdaSpeed, and Hyundai markets. Grimmspeed is a true garage start-up filled with real enthusiasts like yourself. They have a wide breadth of expertise consisting of exhaust design, gaskets, pullies, phenolic spacers, porting and polishing), boost controllers, and many more.