HPS Performance High Temp Reinforced Silicone Heater Core Bypass Loop Coolant Hose LS LT LQ, Blue, 57-1864-BLUEKey Features Ideal kit to bypass the cabin heater on any LS family engine (LS1, LT1, LQ9, etc.) with 5 8" and 3 4" heater supply and return ports. Lowest profile heater loop on the market (3 inches tall). Eliminates concerns about air pockets that can develop when capping off heater lines. Withstands harsh high temperature and high pressure operating conditions. Max. temperature rating: 350F (177C). Includes HPS 100% stainless steel industrial grade