The Wehrli Stage 1 high-flow intake bundle for 2001–2004 Duramax LB7 replaces the restrictive OEM Y-bridge and intercooler pipes with mandrel-bent 3-inch aluminum piping feeding a TIG-welded, CNC-machined billet Y-bridge to create a full 3-inch intake tract. The kit improves throttle response, turbo spool and reduces EGTs, and includes upgraded silicone boots, clamps and an FPRV block-off kit. Made in the USA and finished in custom powder coat.
Wehrli 01-04 Duramax LB7 Stage 1 High Flow Intake Bundle Kit - Candy Teal