The TiAL QR Blow Off Valve was designed on the principal of keeping maximum recirculation by allowing vent to atmosphere in a recirculating valve. The QR BOV is a revision of the Alpha Q, the original TiAL recirculating blow off valve. This is a universal blow off valve for use on any turbo-charged or super-charged application (Paxton, Vortec, etc.). With a TiAL 50mm Blow Off Valve in place you can improve the long term durability and reliability of your turbocharger by preventing compressor surge during closed throttle and high vacuum conditions. Features: - 1.98 in (50.5mm) valve - High Pressure Viton O-Ring - Teflon-lubricated and hard anodize-coated Valve Stem and Guide - Available w/ Black, Blue, Red, Silver or Purple Body - Available w/ either 35.4mm ( 1.00") Subaru/Bosch Style, 29mm ( 1.14") GTR Style, 34mm (1.34) DSM/EVO Style or 38.1mm (1.50) return fitting - Available w/ Aluminum, Mild Steel or Stainless Steel V-Band Weld Flange - Can swap the bottom with the bottom of a Q BOV to make it a fully vent to atmosphere BOV in the future What's Inside the Box? - TiAL QR BOV Assembly - TiAL Aluminum V-Band Clamp - TiAL V-Band Weld Flange - TiAL High Pressure O-Ring - TiAL Banjo Type Air Fitting/Bolt - 10mm Hose Barb for quick actuator response Choosing a Spring Rate: - For Superchargers use 2 psi (0.14 bar), Green Spring - For -8 to -11 inHg Engine Vacuum use 6 psi (0.41 bar), Black Spring - For -12 to -15 inHg Engine Vacuum use 8 psi (0.55 bar), White Spring - For -16 to -19 inHg Engine Vacuum use 10 psi (0.69 bar), Unpainted Spring - For -20 to -21 inHg Engine Vacuum use 11 psi (0.76 bar), Yellow Spring- For -22 to -23 inHg Engine Vacuum use 12 psi (0.83 bar), Brown Spring
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