Mishimoto LS Heater Core Bypass Hose Black

If you're performing an LS engine swap into a different vehicle, or building a racecar where the heater core isn't needed, bypassing the heater core ports is a crucial step. Mishimoto offers a clean and simple solution with their silicone heater core bypass hose. This hose is designed to fit all GM LS V8 engines, allowing coolant to flow through the water pump ports. This is important because blocking the ports entirely can prevent coolant from circulating properly to the thermostat, potentially leading to overheating. Instead, this bypass hose ensures coolant can still reach the thermostat to regulate engine temperature.

Constructed from 5-layer silicone, this hose is built to handle the heat and pressure found in your cooling system. It's designed to taper from 3/4" on one end to 5/8" on the other, matching the common "in" and "out" ports found on LS V8 water pumps. This makes for a straightforward installation, whether you're working on a classic Camaro, a Pontiac GTO, or a modern Chevrolet SS. Mishimoto backs this bypass hose with their signature lifetime warranty, giving you peace of mind with your swap project.