Profiler 174320493 - Cylinder Head Cast Aluminum Chevy Big Block 320cc 119cc 24 Degree 2.300" x 1.880", Assembled w/ 1.437" springs for solid flat tappet or hydraulic roller liftersProfiler 174320493 Cylinder Head Cast Aluminum Chevy Big Block 320cc 119cc 24 Degree 2. 300" x 1. 880", Assembled w 1. 437" springs for solid flat tappet or hydraulic roller lifters 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