Product Information
- Completely Assembled with Revised Runner and Combustion Chambers. Add 30HP to Stock Motor with NO Additional Modifications
- New Casting and Complete Assembly with New Stainless Steel Valves, Hardened Steel Exhaust Seats, Valve Springs, Valve Locks and Retainers
- Utilizes High Performance screw-in Rocker Arm Studs in place of Factory Press in Rocker Arm Studs
- Fits: Mid GM Small Block 5.7L High Performance
- All Sierra parts qualify for and are covered under Sierra's Industry Leading Customer Satisfaction Warranty