The Pro Action™ Small Block Chevy heads, by RHS™, deliver exceptional out-of-the-box performance gains for Small Block Chevrolet applications. Pro Action™ SBC head features include an angle spark plugs, multi-angled intake and radius exhaust with ductile iron seats. These heads accept 1.550” springs and standard style rockers and valve train.
FEATURES:
• Multi-angled intake valve seats
• Radius exhaust valve seats
• Improved valve guide design
• Refined water jacket design
• Manganese intake valve guides
• Bronze exhaust valve guides
• Hardened valve seats
• Thick deck faces
• Clean Cast Technology™
• Approx. HP 375-425
Cast Iron 64cc Chamber, Pro 23° - 180cc Runner - Straight - Bare, 2.020" Intake, 1.600" Exhaust + .100"