Mishimoto · New
Mishimoto LS Heater Core Bypass Hose Black
MPN MMHOSE-LSHB-BK · Store SKU misMMHOSE-LSHB-BK
Supplier stock checked 11/8/2026, 10:02:34 AM UTC. Adding a part does not reserve it.
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Product details
If you're doing an LS swap, chances are you won't be running a heater core in the platform you're swapping. Whether you're doing an LS swap or building your LS-powered racecar, the Mishimoto Silicone GM LS V8 Heater Core Bypass Hose is the easiest and cleanest solution for bypassing your heater core. Our bypass hose is constructed from heat and pressure resistant 5-layer silicone and tapers from 3/4" to 5/8" to fit the in" and out" ports on your water pump. Bypassing the heater core with a bypass hose is the preferred method, as opposed to blocking off the ports. This allows coolant to flow for your thermostat to function properly and avoid overheating. As with all our products, the Mishimoto Silicone GM LS V8 Heater Core Bypass Hose is backed by our signature Mishimoto Lifetime Warranty. Complete radiator coolant hose kit designed to maintain proper coolant flow and system pressure. Includes durable, heat-resistant hoses for leak prevention, reliable performance, and a precise, easy installation. Silicone Heater Core Bypass Hose, Black, fits GM LS V8
Manufacturer fitment & guides
Check MMHOSE-LSHB-BK against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
