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Wehrli S400 single turbo install kit for 2001–2004 LB7 Duramax applications, built to accept larger-frame turbos while keeping installation straightforward. Includes a 5" fabricated intake with air box, 3" mandrel-bent intercooler plumbing, a high-flow billet y‑bridge, stainless braided oil feed and drain lines, and a ceramic-coated downpipe that mates to the factory V‑band to avoid exhaust modification.
Wehrli 01-04 Duramax LB7 S400 Single Turbo Install Kit - Gun Metal
