Motion Raceworks Universal DIY 4-Port LS Steam Kit – Complete Coolant Crossover System

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Universal 4-Port LS Steam Kit – DIY Cooling Upgrade for LS Engines The Motion Raceworks Universal 4-Port LS Steam Kit is a do-it-yourself assembly designed to improve coolant flow and reliability in your LS build. By venting all four corners of the cylinder heads, this kit helps eliminate steam pockets, balance cylinder head temperatures, and protect against hot spots that can damage head gaskets or tuning stability. Key Features: DIY kit – requires customer assembly with supplied components. Complete 4-corner coolant crossover layout for balanced cooling. Includes billet blocks, braided line, hose ends, and radiator weld bung. High-quality fittings and components designed for performance use. Fitment / Compatibility: Suits most Gen III & Gen IV LS engines (LS1, LS2, LS3, LS6, etc.). Works with a wide range of factory and aftermarket intake manifolds. For low-profile plastic intakes with limited clearance, consider the Flex Line version instead. Important Notes: This kit arrives unassembled — final assembly and installation must be carried out by the end user. Clearance between the intake and valley cover must be verified. Proper return line routing to the radiator (just below the cap) is required for correct function. Why Choose This Kit:Affordable, flexible, and effective — this DIY steam kit gives you the benefits of a full 4-port crossover system while allowing custom routing and installation. A smart choice for performance LS builds seeking consistent cooling and reliable performance. Show more