Quick view COBB | sku: E1120G COBB TD05H-20G-8 Turbo - 2015+ STI DESCRIPTION The COBB 20G is an ideal turbo upgrade for those looking to increase the top-end power of their STI while maintaining low and mid-range response. Capable of producing 400hp and retaining excellent throttle response, the COBB 20G... View Details Compare
Quick view COBB | sku: 715750 COBB 3 Port Boost Control Solenoid (BCS) - 2015+ STI The COBB 3-Port Boost Solenoid (BCS) is an excellent upgrade for modern turbocharged vehicles, enabling precise boost control in a tidy package that is easy to install and tune. Our BCS will eliminate boost fluctuations inherent in the OEM... View Details Compare
Quick view COBB | sku: 712660 COBB XLE BPV - 2015+ STI DESCRIPTION The COBB XLE BPV is a compact and lightweight by-pass valve that is capable of holding very high boost pressure without leaking. Its unique design allows for extremely fast venting of boost when actuated. Innovative engineering and... View Details Compare
Quick view GFB | sku: 5933 GFB Mach 2 Atmosphere Conversion Kit - 2015+ STI If you've purchased T9103 or T9133 and want to upgrade it to a vent to atmosphere BOV, here's the kit you need. Comes with a trumpet, spring, and plug. View Details Compare
Quick view GFB | sku: T9103 GFB Mach 2 TMS Recirculation Diverter Valve - 2015+ STI Here's the simple and essential mod for 30% quicker boost by utilizing proven TMS technology to ensure dependable boost holding and optimum throttle response. If you don't need the patented venting bias adjustment feature of the Respons or Deceptor Pro,... View Details Compare
Quick view GFB | sku: T9003 GFB Response TMS Adjustable BOV - 2015+ STI Atmosphere venting BOV won’t work on your car? Try a GFB Respons – you’ll be surprised! JUST ANOTHER DUAL-PORT BOV? On the surface it may look like just another dual-port blow-off valve,but the Respons is actually much more than that... View Details Compare
