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WCFab Stage 1 high‑flow bundle for 2017–2019 Duramax L5P replaces restricted factory intercooler and resonator piping with heavy‑duty mandrel‑bent aluminum pipes: a 3" driver (hot) side and 3.5" passenger (cold) side. The kit includes reinforced silicone boots, stainless T‑bolt clamps, a CNC‑machined flange with double O‑rings, and a powder‑coat finish; it installs on stock trucks with basic tools and requires no tuning.
Wehrli 17-19 Chevrolet L5P Duramax High Flow Intake Bundle Kit - Illusion Purple
