Header Bolt Kit GM LS 8mm x 1.25 x 25mm

The Header Bolt Kit GM LS 8mm x 1.25 x 25mm by MOROSO is a crucial fastener upgrade designed specifically for LS engine builds and header installations. This kit is ideal for those working on street engines, track cars, or restoration projects, providing the necessary durability that stock fasteners often lack under extreme conditions.

Engineered to withstand the rigors of heat and pressure cycling, these premium-grade bolts resist galling, loosening, and thermal fatigue. The 8mm x 1.25 thread pitch is tailored to fit GM LS platform header flanges precisely, ensuring optimal clamp load and repeatability. The 25mm length is designed for adequate engagement depth, preventing any bottoming out in cylinder head bosses.

MOROSO's commitment to quality means that serious engine builders can rely on these fasteners for consistent performance across multiple heat cycles. This kit is perfect for LS engine swaps, custom header fabrication, and engine rebuilds, ensuring secure header installations in any application.