For 98-up LS LT GEN 3 4 5 Engine with 5/8" and 3/4" heater supply and return ports.
Loops the heater supply and return ports on your LS/LT water pump.
Reduce curb weight by allowing safe removal of the heater core.
Prevent and fix the coolant leaking and engine overheating problem.
Long-lasting quality and engineered for high-temperature service and prolonged exposure to under-hood and coolant heat.