Sikky Manufacturing - Universal LS Swap Heater Core Line Kit (SM-HK001)When swapping an LS engine into any car clearance between the firewall and the engine can be tight. Making it extremely difficult to get your heater core lines hooked up properly. The last thing you want to do is rig up some line that wasnt meant to bend that tight and risk kinking it or worse causing it to rupture and leave you stranded and overheating. We developed the tightest radius 5 8 ID 90 degree hose ends available to solve this problem once