ARP Pontiac 67 & prev. 400-428 12pt head stud kit

ARP's 12-point head stud kit for Pontiac 400 and 428 engines built before 1967 uses 8740 chrome moly steel, a well-built material known for its strength and durability. These studs are a significant upgrade over stock head bolts, offering a more consistent and reliable clamping force to keep your cylinder heads sealed tight under pressure. If you're rebuilding the top end of your Pontiac V8 or just looking for a more robust solution than factory fasteners, this kit is designed to handle the demands of performance applications.

The 12-point nuts and washers included in this kit are designed for easier access and tightening, especially in tight engine bays where a standard 6-point socket might be difficult to use. ARP machines these studs to exacting tolerances, ensuring they thread in smoothly and provide the correct engagement with your block and heads. Using head studs like these helps prevent cylinder head lifting and gasket leaks, which is crucial for maintaining engine integrity and performance, especially when you're pushing your engine harder than stock.

This kit includes all the necessary studs, nuts, and washers for one engine. For proper installation, it's recommended to follow ARP's specific torque-down procedures, which typically involve a multi-step tightening sequence to achieve the best results and ensure the gasket seats evenly. Always refer to the manufacturer's installation instructions for detailed guidance.