Toyota Main Stud Kit - 22R

The Toyota Main Stud Kit - 22R from ARP is engineered for serious engine builders and mechanics who demand reliability under extreme load conditions. This chromoly fastening system is purpose-built for Toyota 4-cylinder engines with 2-bolt main configurations, addressing a critical need in both street and competition applications. Main studs are foundational to engine integrity, and ARP's reputation for precision manufacturing makes this kit an industry standard for those rebuilding or upgrading Toyota powerplants that require bulletproof bottom-end security.

This kit features chromoly construction with black oxide finish, offering superior tensile strength and corrosion resistance compared to OEM fasteners. The 12-point nuts provide secure engagement and reduced fastener slippage during torque application—critical for maintaining clamping force in high-RPM or forced-induction environments. The 2-bolt main design aligns with original Toyota 22R architecture, ensuring drop-in compatibility without modification. ARP studs are manufactured to exacting tolerances, allowing precise torque specifications that prevent both under-clamping and dangerous over-tightening of the main bearing caps.

Professional engine builders, restoration shops, and Toyota 4-cylinder enthusiasts rely on this kit for 22R blocks destined for long-term duty or increased output. Installation is straightforward for those with engine assembly experience; however, proper torque sequence and final tension specs must be followed precisely to realize the stud's performance advantages. This is not a casual upgrade—it represents a commitment to engine longevity and reliability when OEM fasteners fall short of your performance or durability standards.