Mishimoto MMHOSE-LSHB-BK Silicone Heater Core Bypass Hose, Black

The Mishimoto MMHOSE-LSHB-BK Silicone Heater Core Bypass Hose is a simple, clean way to bypass the heater core on a GM LS V8. If you are doing an LS swap or building an LS-powered race car, you likely won't be running a heater core, and this hose gives you a tidy solution.

Key Features:

• Constructed from heat- and pressure-resistant 5-layer silicone
• Tapers from 3/4" to 5/8" to fit the "in" and "out" ports on the water pump
• Black finish
• Keeps coolant flowing so the thermostat can function properly and help avoid overheating

Bypassing the heater core with a hose is the preferred method compared with blocking off the ports. Coolant continues to circulate through the system, making this bypass hose a practical choice for LS swaps and LS-powered race builds.