8mm x 1.25 x 5/16 Stud 2.725 OAL w/Guide

The ARP 8mm x 1.25 x 5/16 Stud 2.725 OAL w/Guide is a precision-engineered fastener designed for high-performance engine and drivetrain applications where reliability under extreme load is essential. This stud is particularly suited for engine block assembly, cylinder head bolting, and specialty automotive construction.

Manufactured from chromoly steel and finished in black oxide, the stud features dual-thread geometry, accommodating both 8mm x 1.25 and 5/16-24 inch threading. This design allows for universal fastening scenarios without the need for multiple part numbers. The integrated guide ensures precise positioning during assembly, which reduces installation time and prevents cross-threading.

Ideal for builders and technicians working on universal engine platforms and custom engine blocks, this stud is perfect for motorsport applications where both metric and SAE specifications must coexist. Its superior tensile strength guarantees consistent preload retention under thermal cycling, vibration, and sustained high loads.