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Wehrli Custom Fab’s twin-turbo kit is developed for 2001–2004 Chevrolet Duramax LB7 engines using an S400/stock compound layout; the base kit ships without turbos. It’s offered for drivers seeking larger power potential—supporting combinations that reach notable RWHP levels with appropriate turbo and fuel upgrades—and includes intercooler piping, oil lines, clamps, and other turbo kit hardware finished in WCFab red.
Wehrli 01-04 Chevrolet 6.6L LB7 Duramax S400 Twin Turbo Kit (No Turbo) - WCFab Red
