Bopurtotly 551699 Heater Core Bypass Hose Coolant Crossover Loop, -40°F to 257°F Temperature Resistant,without hardening or failure,5/8" & 3/4" with 2 Pack Stainless Steel Clamps for LS LT Engines

PREMIUM COOLANT BYPASS KIT: Designed for heater core delete, coolant crossover and LS swap applications. Directly connects engine water pump heater ports to complete a clean, simplified cooling system loop.. WIDE TEMPERATURE RESISTANCE: Constructed to withstand a working temperature range from -40°F to 257°F. Maintains flexibility and stability in extreme cold and high heat engine environments without hardening or failure.. CRACK-RESISTANT & DURABLE STRUCTURE: Made with reinforced rubber material engineered to resist cracking, splitting and aging under long-term use. Built to handle constant engine vibration and pressure for extended service life.. SECURE LEAK-PROOF SEAL DESIGN: Engineered for tight, consistent sealing to prevent coolant leaks. The combination of precision molded ends and included stainless steel clamps ensures reliable, long-lasting sealing performance.. STANDARD FIT FOR LS/LT ENGINES: Features 5/8"" and 3/4"" port ends to match factory heater hose connections. Compatible with most LS and LT series engines, ideal for engine swaps and cooling system modifications.