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  • Fits all GM LS engines
  • Allows you to bypass heater core
  • Bypassing instead of blocking water pump ports allows coolant to flow to thermostat and avoids overheating
  • 5-layer silicone construction is heat and pressure resistant to provide a durable, long-lasting solution
  • Tapers from 3/4-in to 5/8-in for a perfect fit
  • Perfect for LS swaps
  • Includes clamps
  • Available in Black, Blue, and Red
  • Mishimoto Lifetime Warranty


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-in to 5/8in to fit the inlet and outlet 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.

Purchase Includes

(1) Silicone Heater Core Bypass Hose--(2) Worm gear clamps--Mishimoto Lifetime Warranty

More Information
Maximum Temperature (F)330
Engine CodesLS
ApplicationsAll GM LS V8--1997-2004 Chevrolet Corvette (LS1)--2005-2013 Chevrolet Corvette (LS2, LS3, LS7, LS9)--1998-2004 Chevrolet Camaro (LS1)--1998-2004 Pontiac Firebird (LS1)--2010-2015 Chevrolet Camaro (LS3, LS7, LSA)--2004-2006 Pontiac GTO (LS1, LS2)--2005-2006 Chevrolet SSR (LS2)--2005-2008 Pontiac Grand Prix (LS4)--2006-2015 Cadillac CTS (LS2, LSA)--2006-2009 Chevrolet Impala (LS4)--2006-2007 Chevrolet Monte Carlo (LS4)--2006-2009 Chevrolet Trailblazer (LS2)--2008-2009 Buick Allure (LS4)--2008-2009 Buick LaCrosse (LS4)--2008-2009 Saab 9-7x (LS2)--2009 Pontiac G8 (LS3)--2014-2017 Chevrolet SS (LS3)
Interior MaterialSilicone