ARP Cylinder Head Bolt Kit 289/302 Ford

The ARP 154-3701 cylinder head bolt kit is engineered for optimal installation of original or aftermarket cylinder heads on 289/302 Ford engines requiring 7/16 inch head bolts. Constructed from premium 8740 chrome moly steel, these ARP High Performance Series bolts boast a tensile strength of 180,000 psi, surpassing Grade 8 hardware by 15%. The black oxide finish provides durability, while the 12-point head style offers a secure fit. Each kit includes 20 bolts and 20 hardened, parallel-ground washers, ensuring a complete fastening solution. ARP meticulously heat-treats its bolts to 200,000 psi and thread rolls them after heat-treatment. This process results in approximately 1000% greater fatigue strength compared to fasteners threaded before heat-treatment, a common industry practice. Each bolt is stamped with the ARP logo as a mark of quality. This bolt kit is specifically designed for 289/302 engines with factory cylinder heads or compatible Edelbrock heads (60259 & 60379) that feature 7/16 inch bolt holes. It is crucial to note that this set will not work with 351W / 5.8L engines or Ford Performance BOSS 302 blocks, as these utilize 1/2 inch bolt holes. For applications requiring 1/2 inch bolt holes, a different kit with reducer bushings/washers (NPD part number M-6065-9BARP) is necessary.