The Wehrli Stage 2 High Flow intake bundle for 2006–2007 Duramax LBZ includes a 4-inch aluminum intake pipe, a 4.8-inch turbo intake horn claimed to improve flow about 20% over stock, high-flow intercooler piping, a two-piece 3-inch Y-bridge and upgraded silicone boots and clamps. It fits stock trucks without tuning, improves intake and intercooler flow, and ships finished in custom powder coat colors.
Wehrli 06-07 Chevrolet Duramax 6.6L LBZ Stage 2 High Flow Intake Bundle Kit - Bengal Silver