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Sierra Grande 1977 GMC C15 Indy Hauler 1978 GMC C15 Street Coupe 1975 - 1978 GMC C15 Suburban High Sierra
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Line up the assembly and secure at the OEM attachment locations
Silvia Engine SR20DET (Blacktop) Chassis PS13
Direct replacement for the stock cover—no cutting or modification required
Tomei Racing Valve AST Sierra Grande 1977 GMC C15OVERSIZED VALVES The oversized head diameter is designed specifically for each application, significantly improving the flow rate. WAISTED STEM The waisted stem allows a greater volume of air gases to enter and exit the combustion chamber as the valve extends. ENGINE SPECIFIC DESIGN Each valve is designed and precision machined specifically for the intended engine application. The head, face, stem and lock groove designs have also been optimized to