R&D G-Reddy Blow-Off Valves are easily adjustable to eliminate compressor surge and preventing premature boost leakage, while increasing boost response.

Each valve is made of durable cast and billet aluminum frame and the valve to diaphragm ratio provides performance that cheap piston types cannot offer.

The spring stiffness adjustment screw and the three different sizes give the Greddy user the option to match vehicles with mild upgrades to heavily tuned engines.

There are many factors in matching a blow-off valve to an application, valve location, turbocharger/supercharger size and pressure, but as a general rule of thumb, R&D recommends the Type RZ for 100-400hp applications.