This comprehensive Stage 4 head work is ideal for 110+ cubic inch engines that require maximum effort. Our process involves unshrouding the chamber and using a 2" intake and 1.65" exhaust valve for optimal results. This kit includes stage 4 CNC port and chamber work, larger valves, double wound pro wire high lift springs, and bronze taper guides. The CNC chambers are cc'd and decked to achieve the desired compression, while utilizing a 2" intake that can flow well over 300 cfm at .600 lift (28"wc) and a 1.65" exhaust valve that can flow over 270 cfm at .600 lift (28"wc).
To ensure safe and efficient processing, please send us your twin cam head cores for machine work. Shipping is the responsibility of the buyer, so please package and insure your parts accordingly. Additionally, please fill out the engine work order and include a copy in your package, as well as email it to shop67parts@gmail.com. Thank you for choosing our services.
During the peak season, please allow 2-3 weeks for processing after we have received your heads. Thank you for choosing Shop67.
