Replace the fragile plastic OEM fittings on the top of your 2004.5-2010 LLY/LBZ/LMM Duramax engine which are prone to damage with these high quality, black anodized, CNC machined billet aluminum fittings from WCFab.
Wehrli Custom Fab Crankcase Vent (PCV) Fitting Kit, Billet, 04.5-10 Duramax LLY/LBZ/LMM, Black
Kit includes two CNC machined billet aluminum fittings with o-ring seals.