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Wehrli Custom Fab billet crankcase vent fittings replace fragile plastic OEM fittings on 2004.5–2010 Duramax LLY/LBZ/LMM engines. CNC-machined from billet aluminum with a black anodized finish, the kit includes two fittings with O-ring seals and 5/8" hose barbs, providing a durable reroute solution made in the USA for those engine platforms.
Wehrli 04.5-2010 Duramax LLY/LBZ/LMM Crankcase Vent (PCV) Fitting Kit - Billet Black Anodized
