Silicone Heater Core Bypass Hose – LS1 LS2 LS3 LS6 LQ4 LQ9 Coolant Bypass Hose Axl Default Title

Silicone Heater Core Bypass Hose – LS1 LS2 LS3 LS6 LQ4 LQ9

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$23.66 $28.91
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Silicone Heater Core Bypass Hose – LS1 LS2 LS3 LS6 LQ4 LQ9 Coolant Bypass Hose Axl Default Title
  • Silicone Heater Core Bypass Hose – LS1 LS2 LS3 LS6 LQ4 LQ9 Coolant Bypass Hose Axl Default Title
  • Silicone Heater Core Bypass Hose – LS1 LS2 LS3 LS6 LQ4 LQ9 Coolant Bypass Hose Axl
  • Silicone Heater Core Bypass Hose – LS1 LS2 LS3 LS6 LQ4 LQ9 Coolant Bypass Hose Axl
  • Silicone Heater Core Bypass Hose – LS1 LS2 LS3 LS6 LQ4 LQ9 Coolant Bypass Hose Axl
  • Silicone Heater Core Bypass Hose – LS1 LS2 LS3 LS6 LQ4 LQ9 Coolant Bypass Hose Axl
  • Silicone Heater Core Bypass Hose – LS1 LS2 LS3 LS6 LQ4 LQ9 Coolant Bypass Hose Axl
  • Silicone Heater Core Bypass Hose – LS1 LS2 LS3 LS6 LQ4 LQ9 Coolant Bypass Hose Axl Default Title
  • Silicone Heater Core Bypass Hose – LS1 LS2 LS3 LS6 LQ4 LQ9 Coolant Bypass Hose Axl
  • Silicone Heater Core Bypass Hose – LS1 LS2 LS3 LS6 LQ4 LQ9 Coolant Bypass Hose Axl
  • Silicone Heater Core Bypass Hose – LS1 LS2 LS3 LS6 LQ4 LQ9 Coolant Bypass Hose Axl
  • Silicone Heater Core Bypass Hose – LS1 LS2 LS3 LS6 LQ4 LQ9 Coolant Bypass Hose Axl
  • Silicone Heater Core Bypass Hose – LS1 LS2 LS3 LS6 LQ4 LQ9 Coolant Bypass Hose Axl
Silicone Heater Core Bypass Hose – LS1 LS2 LS3 LS6 LQ4 LQ9

Silicone Heater Core Bypass Hose – LS1 LS2 LS3 LS6 LQ4 LQ9

$23.66 $28.91
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Keep your LS/LT engine's cooling system running efficiently with this premium silicone heater core bypass hose. Designed to loop the heater supply and return ports on your LS/LT water pump, this crossover hose lets you safely delete the heater core — reducing curb weight and eliminating a common source of coolant leaks and engine overheating.

Made in Mainland China.

Why Choose This Bypass Hose?

  • Crack-Resistant Silicone Construction — Engineered for high-temperature service and prolonged exposure to under-hood heat and coolant, ensuring a long service life.
  • Reliable Sealing — Loops the heater supply and return ports securely on your LS/LT water pump, preventing coolant leaks and keeping engine temperatures stable.
  • Reduces Curb Weight — Allows safe removal of the heater core, ideal for performance builds and engine swaps where weight savings matter.
  • Easy Installation — Straightforward drop-in fitment designed for auto repair shops and DIY enthusiasts alike. Less time wrenching, more time driving.
  • Wide Compatibility — Fits LS1, LSX, LS2, LS3, LS6, LQ4, and LQ9 engines, making it a versatile solution for a broad range of GM performance and swap applications.

Product Specifications

  • Material: High-grade silicone
  • Color: Black
  • Compatible Engines: LS1, LSX, LS2, LS3, LS6, LQ4, LQ9
  • Package Contents: 1 x Heater Core Bypass Hose

Note: Please allow 2–3% dimensional variance due to manual measurement. Colors may vary slightly between screens and actual product.

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Learn more: FuelEconomy.gov driving efficiency guidance

Frequently Asked Questions

Q: Which engines is this heater core bypass hose compatible with?

A: This silicone coolant crossover bypass hose is designed to fit GM LS-series and LQ-series engines, including LS1, LSX, LS2, LS3, LS6, LQ4, and LQ9. It loops directly onto the heater supply and return ports of your LS/LT water pump.

Q: Why would I use a heater core bypass hose?

A: A bypass hose allows you to safely remove the heater core from your cooling circuit — commonly done during engine swaps, performance builds, or when simplifying the engine bay. It keeps the coolant flowing properly through the water pump while eliminating the heater core from the loop, helping prevent coolant leaks and maintaining stable engine temperatures.

Q: Is this hose suitable for high-temperature environments?

A: Yes. This bypass hose is made from high-grade silicone that is engineered for high-temperature service and prolonged exposure to both under-hood heat and coolant temperatures, making it a durable, long-lasting choice for performance and daily-driver applications.

Q: How difficult is installation?

A: Installation is straightforward and designed to be accessible for both professional auto repair shops and experienced DIY mechanics. No special tools are required beyond standard hose clamps and basic hand tools.

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