ARP Toyota 1NZFE 1.5L 4-cylinder DOHC Main Stud Kit

ARP's main stud kit for the Toyota 1NZFE engine uses 8740 chromoly steel, a strong material that can handle the increased clamping forces needed when rebuilding or modifying your engine. These studs are heat-treated and then quenched and tempered to achieve a tensile strength of 200,000 psi, ensuring they won't stretch under load. This is crucial for maintaining proper bearing clearance and preventing crankshaft flex, especially in performance applications.

When you're rebuilding the bottom end of your 1NZFE, using main studs instead of bolts offers a significant advantage. Studs allow for more precise torque application and ensure the main caps stay seated under high stress. ARP's studs feature rolled threads, which are stronger and less prone to stripping than cut threads, and they come with parallel ground, heat-treated washers and aerospace-grade nuts. This kit is designed to fit right and provide a solid foundation for your engine build.

This kit is specifically for the 1.5L 4-cylinder DOHC 1NZFE engine. Always refer to the manufacturer's installation instructions for proper torque specifications and procedures when installing main studs.