Brian Crower 02-09 WRX / 04-09 STI EJ205/EJ255/EJ257 +1mm Over STD Tip (33mm) Exhaust Valve Set 8

ALL THE PERFORMANCE WITH OR WITHOUT THE NOISE!, GFB’s Mach 2 utilises GFB’s proven TMS Technology to ensure rapid boost recovery on gearshift and optimum throttle response, as well as the ability to withstand boost pressures of 100psi+. Put simply, it can hold more boost than any turbo could produce
GFB’s Mach 2 diverter valve is configured from the factory for full recirculation (i.e. plumb back, diverter, bypass) venting for the performance-minded who just want the benefits without the sound. Atmosphere venting kits also available.
Universal 20mm inlet, 20mm outlet

The award-winning Kompact EM series Blow-Off Valves, are the world’s first truly plug and play Blow-Off Valves. Simply unplug and unbolt your OEM Blow-Off Valve, and install ours in its place. No adapters, hoses or extra assembly required. All this while retaining complete OE control of the BOV’s operation. Turbocharger performance is increased due to minimizing leakage, rapid response, coupled with superior thermal performance thanks to our world-leading engineering and simulation abilities. A must-have for hybrid or larger flowing turbos that utilize OE electronic diverter valve by not leaking, the EM will achieve target boost without stressing the turbo charger and wastegate Dual Port vents both to the atmosphere and back into the air intake.
Kompact EM BOV VR11 Dual Port

• Integrated proprietary high-temperature solenoid valve
• Fitment available in Plumback or Dual Port options
• Billet construction with high-temperature O-rings
• Patented integrated pressure control
• Boost-Balance Valve Technology
• True plug-and-play upgrade