Muzzys HEATER CORE BYPASS KIT, Universal, Fits MOST Vehicles and ALL 5/8" and 3/4" ID Heater Hoses. Easily Stop Flow to Your Heater Core With This Premium Hi Temp Hi Pressure By-Pass
Bypass Hose Kit for all small block Ford - Breeze Automotive
Mishimoto LS Heater Core Bypass Hose, Blue
Here's the part number(and result) for the Napa hose I used to do a heater core bypass for anyone interested! : r/Miata
Rubber LS Heater Core Delete Bypass Hose Coolant Crossover For LS1 LSX LS2 LS3 LQ4 LQ9 engine - AliExpress
HPS Red Reinforced Silicone Heater Core Bypass Loop Coolant Hose LS LT - BuildFastCar