GM LS Hardline Steam Tube Kit

The GM LS Hardline Steam Tube Kit is a precision-engineered component tailored for LS engine swap builds and high-performance modifications. This kit is ideal for those installing an LS powerplant into classic trucks, street rods, or race applications, ensuring effective coolant circulation between the engine block and heater core or overflow system.

Constructed from premium aluminum tubing with precision-formed hard fittings, the GM LS Hardline Steam Tube Kit is designed for durability and reliability. It features a fixed geometry design that minimizes hose expansion under pressure cycles, reducing the risk of fitting separation or coolant loss. This construction is particularly beneficial in engine bays exposed to high heat from turbos or superchargers.

This kit is compatible with LS1, LS2, LS3, LS6, and LSx engines across various swap platforms, including Chevrolet, GMC, Pontiac, and third-party applications. Builders who prioritize clean, leak-free plumbing will find this kit advantageous, as it integrates seamlessly with modern LS architecture and provides consistent coolant flow during both street driving and racing.