Bosch ® OEM LLY/LBZ/LMM Return Line Kit - Pair

Genuine BOSCH ® OEM Brand New return line assembly for LLY/LBZ/LMM Duramax applications. These return line assemblies are notorious for breaking during removal or leaking due to cracks and heat stress.  Replacing the return line assembly during injector installation helps prevent contamination issues and leaks due to cracked or brittle hoses and fittings.