Fits: 2007.5 thru 2010 Chevy Silverado/GMC Sierra 2500HD/3500HD LMM Duramax

This Modified Coolant Tube for LMM Duramax 6.6L is designed for use with MaxFlow and PPE Up-pipes and Manifolds.
We cut, reposition, and weld the coolant tube for proper clearance with bigger diameter up-pipes and manifolds. Coolant that flows through the tube provides heat to the heater core for the in-cab AC/Heat system.