Pay in 4 interest-free payments of $31.25 Learn more
Ships within 48 hours · Estimated delivery Aug 12 - Aug 17
WRX and Forester models will need OEM STI or GrimmSpeed Y-Pipe Kit
Just reverse installation
too many to count
Integrated Tool Tray - Never forget a tool in your engine bay again
GrimmSpeed Manual Boost Controller - Universal 2005 WRX and Forester models willWelcome to the next evolution of boost control, The GrimmSpeed Manual Boost Controller. Introducing the most refined Manual Boost Controller available on the market. We spent over a year working hand in hand with Tuners across the country to develop our MBC. Our Manual Boost Controller allows you to raise the OEM boost levels in a quick and efficient manner. Adding the MBC will result in Quicker Spool Up, Quicker Response, Increased Horsepower, and
