Profiler 174320491 - Cylinder Head Cast Aluminum Chevy Big Block 320cc 119cc 24 Degree 2.300" x 1.880", Assembled w/ 1.550" springs for solid roller lifters, Titanium retainersProfiler 174320491 Cylinder Head Cast Aluminum Chevy Big Block 320cc 119cc 24 Degree 2. 300" x 1. 880", Assembled w 1. 550" springs for solid roller lifters, Titanium retainers The Profiler Sniper cylinder head is designed with the most up to date technology available, this Sniper head flows 380cfm @ . 750". We started with the most sound casting available and then spent months developing the best port and chamber for a 24 head. All heads are "As