Assembly Specifications Max Lift: .600 Coil Bind: 1.080 Intake Install: 145lbs @ 1.9 Exhaust Install: 145lbs @ 1.9 Closed Sear Pressure: 130lbs Open Seat Pressure: 320lbs One of the best upgrades to your Big Block Ford engine is the replacement of your cast iron head to a better performing and lighter aluminum head. How great is it that you can now do it at a price that's affordable. Our line of Big Block Ford performance heads have proven themselves time and time again both on the track and on the dyno, not to mention countless features in performance magazine articles. We offer Big Block Ford cylinder heads for a wide range of displacement applications. With bigger displacement engines becoming more common, the need for more airflow is necessary. If you are looking to build a 400-700 horsepower engine then you should consider Speedmaster Aluminum cylinder heads.
Assembled with the finest premium components to provide your engine with optimal airflow for maximum engine performance
Improved power throughout the rpm range for greater throttle response and top-end horsepower