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Wehrli’s Stage 1 High Flow Bundle for 2017–2019 L5P Duramax upgrades the intercooler plumbing with a 3" driver side and 3.5" passenger side heavy‑duty aluminum pipe set to improve flow and durability. The package replaces weak factory joints, includes reinforced silicone boots, stainless t‑bolt clamps and a CNC‑machined flange with double O‑rings to reduce boost leaks. It installs with basic hand tools, fits stock trucks and is finished in a custom Gun Metal powder coat.
Wehrli 17-19 Duramax L5P Stage 1 High Flow Bundle Kit - Gun Metal
