LS Head Bolt Set 2004-06 Gen III

The LS Head Bolt Set 2004-06 Gen III is a critical fastener kit engineered for General Motors LS-series engine platforms, specifically designed to secure cylinder head assemblies with precision and reliability. This hex head bolt set is essential for engine builders, mechanics, and automotive enthusiasts who demand OE-equivalent performance and durability during cylinder head installation or rebuild operations. Whether you're performing routine maintenance, restoring a classic LS engine, or building a high-performance variant, proper head bolt specification is non-negotiable for gasket sealing integrity and long-term engine stability.

Constructed from hardened steel with a zinc oxide finish, this ALLSTAR PERFORMANCE cylinder head bolt kit resists corrosion while maintaining consistent clamping force across the combustion chamber seal. The zinc oxide coating provides both chemical protection and a slight lubricity benefit during installation, reducing the risk of bolt galling or thread damage. Hex head design allows standard socket and wrench compatibility, making removal and reinstallation straightforward for technicians familiar with LS platform architecture. The fasteners meet OE specifications for tensile strength and preload requirements, ensuring proper gasket compression and preventing coolant or oil seepage at the head-block interface.

This head bolt set is engineered for 2004–2006 LS engines and compatible with factory and aftermarket cylinder heads designed for that generation. Proper torque sequence and procedure are critical—technicians should consult the specific engine's service manual to ensure correct loading patterns and final fastener tension. The compact kit dimensions (5.4 x 3.3 x 6.7 inches) make storage and inventory management straightforward for shop environments, while the 4.1-pound weight reflects a complete, ready-to-install set. Anyone rebuilding an LS block, replacing a head gasket, or assembling a performance engine will benefit from using OEM-equivalent fasteners like this kit.