Profiler Sniper X 174XC3703 - Cylinder Head Cast Aluminum Chevy Big Block 375cc 119cc 24 Degree 2.350" x 1.850", CNC Ported, Bare CastingProfiler Sniper X 174XC3703 Cylinder Head Cast Aluminum Chevy Big Block 375cc 119cc 24 Degree 2. 350" x 1. 850", CNC Ported, Bare Casting The Sniper X cylinder head is the latest BBC head offered in the Sniper Series. Designed with the most up to date technology available, the Sniper X head flows over 460cfm on a 375cc runner and over 325cfm on the exhaust! We started with the most sound casting available and then spent months developing the best port