Main Cap Stud Kit GM LS 4.8/5.3/5.7/6.0L

The Main Cap Stud Kit GM LS 4.8/5.3/5.7/6.0L from PRW Industries is an essential fastening solution designed for General Motors LS-series engine builders and high-performance enthusiasts who require reliability under extreme conditions. This kit is particularly beneficial for those involved in forced-induction, nitrous, or high-RPM applications, where the durability of factory hardware is often inadequate.

Constructed from premium steel with a black oxide finish, the Main Cap Stud Kit features 12-point nuts that enhance engagement and minimize the risk of stripping compared to 6-point alternatives. The black oxide treatment not only resists corrosion but also eliminates the need for additional plating, ensuring consistent clamping force and long-term reliability in engine environments subject to heat cycling and moisture.

This 6-bolt main configuration is compatible with all standard LS displacements—4.8L, 5.3L, 5.7L, and 6.0L—making it a universal upgrade for most LS swap and performance builds. Precision manufacturing guarantees accurate thread pitch and nut engagement geometry, which is critical for maintaining proper clamping load and preventing catastrophic main bearing failure.