A Duramax CCV reroute setup (Crankcase Ventilation reroute) is a popular reliability and performance upgrade for 6.6L Duramax engines, including LB7, LLY, LBZ, LMM, LML, and L5P platforms. It is designed to redirect oil vapor and blow-by gases away from the intake system, helping keep the engine cleaner and improving long-term durability.
Over time, the factory CCV system can send oil...
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