Quicksilver® cylinder heads are ideal replacement components for many GM®-style 4-cylinder and V8 engines in marine, circle track racing, RV, truck and hard-to-find industrial applications. With exclusive Black-X valves, these heads are designed to be the most robust, durable and toughest service cylinder heads available.
Better Than Original
We made the castings thicker, improved the combustion chamber for better burn characteristics, and included premium springs and hardened seats on the intake and exhaust ports for our exclusive Black-X valves.
Black‑X composite valves contribute to a 42% reduction in valve wear compared to traditional stainless steel valves with hardened seats, for longer engine life, especially in the presence of modern ethanol-blended fuels.
One-Year Limited Warranty
The quality of Quicksilver cylinder heads is backed with a one-year limited warranty.