Mishimoto
Mishimoto LS Heater Core Bypass Hose Red
SKU: M00C MMHOSE-LSHB-RD
Description
Part #: MMHOSE-LSHB-RD
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.
Features:
- 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" to 5/8" for a perfect fit
- Perfect for LS swaps
- Includes clamps
- Available in Black, Blue, and Red
- Mishimoto Lifetime Warranty
Silicone GM LS V8 Heater Core Bypass Hose
Fitment
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Specifications
| Brand | Mishimoto |
| Part Number | M00C MMHOSE-LSHB-RD |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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