GFB SV52 High Flow BOV - Rated at Over 300psi (Suits All High Powered Turbo or Supercharged Engines) Wheel and Tire Accessories>Spare Tire Carriers and fully validated by some

and fully validated by some of the world's best Porsche tuners

offering a 150 lbs weight capacity and compatibility with hardtop

the Foiler™ doesn’t draw unnecessary attention with carbon weave or enlarged wings

and grade 10

while still offering ample protection from small rocks and road debris - all proven on CSF's in-house wind tunnel

GFB SV52 High Flow BOV - Rated at Over 300psi (Suits All High Powered Turbo or Supercharged Engines) Wheel and Tire Accessories>Spare Tire Carriers and fully validated by someStrength and reliability is the primary factor, something that a diaphragm simply cannot match in a high boost BOV environment. Diaphragms have their place (we use them in our wastegates), as they offer low friction and good sealing capability. However, a rolling diaphragm is only designed to receive a net pressure on one side, which essentially "inflates" it against the walls of the chamber in which it resides, exactly how it is used in a wastegate