WRX/STi Racing Bypass Valve (WS-RBV) US$219.00 Specifically designed for MY 2002 and up Subaru WRX and STi's, the WS-RBV requires no adapter kit to install. It is designed for people who want to run high boost levels, but still vent their BOV back to the air intake to maintain maximum driveability.   2008 WRX RFL (WS08-RFL) US$229.00 The WS08-RFL or Really F#$%!@ Loud is designed specifically for the owner of a 2008 WRX who wants a vent to atmosphere blow off valve. This is the loudest valve on the market at 115 db at 15 psi. Athough it is not only sound and aethestic mod with it's polished/anodized finish, the RFL adds function when you are running high boost pressures.    2008+ WRX Racing Bypass Valve (WS08-RBV) US$219.00 Specifically designed for MY 2008+ Subaru WRX & Legacy GT. The WS08-RBV requires no adapter kit to install. It is designed for people who want to run high boost levels, but still vent their BOV back to the air intake to maintain maximum driveability.   Blow Off Valve Type H-RFL (BOV-RFL) US$189.00 With new and improved styling, the BOV-H-RFL remains true to it's roots - it's still really f'n loud! Like all our valves, the RFL relieves compressor pressure surge caused by changing gears or backing off the throttle and has been used on turbo charged engines running upto 35 psi boost. If you need to ask how loud it is, this valve is too loud for you! Blow Off Valve Type H-RFL comes standard with both a mild steel and aluminum weld-on adapters. Bolt-on kits are available for most OEM turbocharged applications.   Blow Off Valve Type H: (BOV-H) US$179.00 Want a valve that people notice when it goes off but don't want "RFL-loud"? The BOV Type H is the valve for you. Providing greater venting flow than our BOV-S, the BOV-H is designed for turbo charged engines running up to 35 psi. Crafted from hard anodised aluminum and brass, the valve is practically indestructable.   Blow Off Valve Type S: (BOV-S) US$129.00 Our smallest valve, the BOV Type S is recommended for small to medium sized turbo charged engines of less than 2.0 liters. Excellent flow in a compact package, the valve is perfect for your turbocharged Honda.   Racing Bypass Valve -Type H Reversible (RBV-H) US$189.00 Identical in design to our RBV-H34 with the exception that the outlet of the valve is our standard Type H female inlet instead of a 34mm hose adapter. This allows the valve to be used either in normal fashion or "reversed". Using the valve in the reversed orientation ensure that the valve will only open up under vacuum. This is perfect for your drag racing car running 35+ psi.   Racing Bypass Valve Type 25 (RBV-25) US$169.00 The Racing Bypass Valve Type 25 was specifically designed to replace the 1 inch (25mm) Bosch Bypass Valve used in most Volkswagen and Audi applications. The Bosch valve is prone to failure in stock application and not adequate for holding boost in "chipped" 1.8T equipped vehicles. The RBV-25 spring tension is adjustable, making it ideal for your modified vehicle. This RBV-25, though louder than a stock bypass valve, is not loud compared to an atmosphere BOV.   Racing Bypass Valve Type H34 (RBV-H34) US$189.00 Racing Bypass Valve Type H34 vents excess pressure back into the car’s air intake making the valve ideal for Mass Air Flow (MAF) metered cars where venting to atmosphere can create a "rich" air/fuel ratio right after the valve goes off. The Racing Bypass Valve Type H is CNC machined out of billet aluminum and brass. Valve operation, while louder than most stock valves, is quiet compared to a BOV that is vented to atmosphere like our BOV-H or BOV-H-RFL. The RBV-H34 comes standard with a 34mm OD anodised aluminum hose adapter for the inlet.