Seller notes

DIRECT FIT REPLACEMENT - Fits selected 2004+ Chevrolet Gen III IV LS Engines. Do not purchase until you have verified primary head bolt lengths (must all be the same length). Engineered to unleash more performance out of your vehicle. Centerless ground to assure perfect concentricity.ULTRA STRENGTH - XOTIC 7200 alloy material properties allow for far greater tensile strength compared to standard bolts. Rated at 220,000 psi tensile strength. Threads rolled after heat treatment for optimum fatigue...

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