Ls Cylinder Head Coolant Steam 4 Port Crossover Hose Kit

551837-LS01: Engine Coolant Crossovers, LS Steam Vent Kits, Aluminum, Black Anodized, Chevy, Small Block LS, Kit - Whether you are replacing a rusted crossover pipe or doing a head swap, coolant crossover kits help increase the flow of coolant through the engine block, reducing engine temperature. They are made from aerospace-grade billet aluminum with a natural finish. By increasing the flow of coolant in the block, thereby reducing engine temperature, you can eliminate hot cylinders and detonation.