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Wehrli Custom Fab S400 single turbo install kit for 2001–2004 Duramax LB7 trucks supplies a complete high‑flow intake and charge system for BorgWarner S400‑style turbos. It includes a 5" fabricated intake and air box, premium dry filter with pre‑filter cover, 3" mandrel‑bent intercooler piping, a 3" ceramic‑coated downpipe, stainless steel oil feed/drain lines, T4 pedestal and driver‑side dipstick relocation tube.
Wehrli 2001-2004 LB7 Duramax S400 Single Turbo Install Kit Candy Teal