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The WCFab Stage 1 high-flow bundle for 2001–2004 Duramax LB7 replaces restrictive OEM intercooler pipes and the Y-bridge with 3" mandrel-bent aluminum piping and a TIG-welded billet y-bridge base to create a full 3" tract between turbo and engine. The kit improves throttle response and turbo spool, includes upgraded silicone boots, FPRV block-off hardware, and is finished in custom powder coat.
Wehrli 01-04 Duramax LB7 Stage 1 High Flow Bundle Kit - Bengal Silver
