ARP Pro Series Head Stud Kit

The ARP 231-4701 is a Pro Series head stud kit engineered specifically for GM 2.2L ECOTEC 4-cylinder engines. Constructed from premium grade 8740 alloy and a proprietary ARP2000® alloy, these studs are heat-treated to an impressive 200,000 psi tensile strength, ensuring exceptional durability and reliability under demanding conditions. These studs undergo a precise heat-treating process prior to thread rolling and machining to guarantee molecular integrity. They are also centerless ground to ensure perfect alignment during installation, eliminating potential fitting issues. The kit comes complete with hardened parallel washers for even load distribution and accurate torque readings, along with 12-point nuts for secure fastening. This ARP head stud kit is specifically engineered for the 2003–2005 Chevrolet Cavalier and Pontiac Sunfire models equipped with the 2.2L I4 ECOTEC engines. For optimal performance and longevity, proper installation according to ARP's instructions is crucial, which includes using the specified torque sequence.