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The Wehrli Stage 1 High Flow bundle for 2017–2019 L5P Duramax replaces weak, leak-prone factory intercooler plumbing with heavy‑duty aluminum pipes: a 3" one-piece driver (hot) side and a 3.5" passenger (cold) side with CNC machined flange and double o-rings. Silicone boots and stainless t-bolt clamps retain factory sensor points. Bolt-on install with basic tools, compatible with stock trucks, no tuning required. Finished in Cat Yellow; saves $25 versus buying separately.
Wehrli 17-19 Duramax L5P Stage 1 High Flow Bundle Kit - Cat Yellow
