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Wehrli's 4" WCFab high-flow intake horn for 2001–2004 Silverado and GMC 2500/3500 HD trucks with the LB7 6.6L Duramax replaces the OEM turbo mouthpiece to increase airflow and throttle response. Flowing roughly 40% better than stock, it fits intake systems using a 4" boot connection with bead roll and supports stock or drop-in IHI turbochargers. Includes mounting hardware and custom powder coat finish.
Wehrli 01-04 Duramax LB7 4in High Flow Intake Horn - Chevy Orange
