GFB SV52 High Flow BOV - Rated at Over 300psi (Suits All High Powered Turbo or Supercharged Engines) 1993 Audi 90 CS

GFB SV52 High Flow BOV - Rated at Over 300psi (Suits All High Powered Turbo or Supercharged Engines) 1993 Audi 90 CSStrength 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

T9480 is a direct bolt-on for Audi

Split rear exit with dual 4" round carbon fiber with bright center tips on each side provide a custom appearance

Innovative CNC machined offset bearing spacers provide +/- 2 degrees of caster adjustment

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6in BS Satin Bronze Wheel

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Swift 60mm Spring Thrust Washers