GM LS Hard Line Steam Tube Kit

The EARLS GM LS Hard Line Steam Tube Kit is a purpose-built coolant circulation solution designed specifically for General Motors LS-series engine swaps and custom builds. This kit manages steam venting and pressure relief through a stainless steel and aluminum construction that resists corrosion and handles elevated engine temperatures. The 3/16-inch tube diameter provides optimal flow characteristics for LS powerplants while the 3 AN female connection integrates seamlessly with standard automotive cooling system adapters.

Built from corrosion-resistant stainless steel tubing with black anodized aluminum fittings, this steam tube kit delivers durability in engine bay environments where moisture and heat accelerate degradation. The included steam vent adapters eliminate the need for sourcing compatible connectors separately, reducing installation time and ensuring proper fitment. EARLS' precision manufacturing translates to consistent performance across repeated thermal cycles—a critical consideration in high-output LS builds where pressure spikes and coolant expansion rates demand reliable venting. The compact footprint (4.95 x 3.55 x 10.6 inches) accommodates tight engine compartment layouts common in GM LS conversions into older platforms.

This kit addresses a specific challenge in LS engine installations: factory cooling systems and aftermarket swap configurations often lack adequate steam relief routing. Engine builders, restoration shops, and performance enthusiasts working on LS swaps rely on quality hard line solutions to prevent air pockets, maintain consistent coolant flow, and protect the engine from overheating. The GM LS Hard Line Steam Tube Kit from EARLS eliminates improvised hose routing and provides engineered cooling system management that supports reliable operation whether the application is a street rod, restomod, or dedicated performance vehicle.