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Wehrli's Stage 2 4" intake kit for 2017–2019 Duramax L5P 6.6L swaps factory plastic plumbing for a fabricated aluminum 4" intake and air box with a larger 3.5" horn and dry filter, improving airflow, torque, and throttle response. The assembly includes silicone boots, stainless t‑bolt clamps, a removable air box lid, and a hydrophobic pre‑filter cover for simpler inspection and protection of intake components.
Wehrli 17-19 Chevrolet 6.6L L5P 4in Intake Kit Stage 2 - WCFab Red
