What makes the EVO valves Better than the Original?
The EVO valve is precision CNC machined from billet aluminum. It utilizes a solid billet piston and twin Viton O-rings. All internal components are lubricated with the highest quality RED LINE high temperature synthetic grease for a lifetime of trouble free use. Our custom wound piston spring is designed to react quicker than the OEM unit for quicker boost response and more power. The EVO valve comes with a LIFETIME Warranty. A: The OEM valve is made of a thin wall injection plastic. The heat of the engine will warp and distort the plastic which causes failure. The internal rubber diaphragm is very susceptible to failure from the heat and constant open and close movement. Rubber will dry out and crack which causes the valve to loose the ability to hold vacuum, thus failing. The weak OEM spring is very slow to react which causes a delay in closing, thus leaking valuable boost pressure and slower boost response.
