The GSC offering of exhaust valves for the Ford Coyote features a45° valve seat contact angle, which differs from the OEM 40° design. Due to this change in the design, it will require a valve job to be performed to install these valves for proper sealing and valvetrain geometry.
When creating our valves, we set out to create the best performance, longest-lasting valves available to the aftermarket. Using advanced 3D design and simulation software, we have created a stronger and higher-flowing valve head design. We flow test prototype valve heads in the specific applications to make sure we have the highest flowing valve head available on the market. With the materials used, we have less valve distortion at the face than any of the tested designs. Less distortion allows for better sealing under extreme conditions and more consistent performance throughout the life of the valve.