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Wehrli S400 single turbo install kit for 2001–2004 Chevy/GMC 6.6L LB7 Duramax trucks, engineered to convert from the stock IHI-style turbo to a large-frame BorgWarner S400 style setup. The kit upgrades intake to a fabricated 5" intake and heavy-duty airbox, replaces intercooler plumbing with 3" mandrel-bent aluminum, includes a fabricated billet y-bridge and stainless braided oil lines, and uses a ceramic-coated downpipe that mates to the factory V‑band.
Wehrli 01-04 Duramax LB7 S400 Single Turbo Install Kit - Bronze Chrome
