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The Wehrli WCFab 4" high-flow cast aluminum turbo intake horn for 2001–2004 Silverado and GMC 2500/3500 HD trucks with the 6.6L LB7 Duramax replaces the restrictive OEM inlet to increase airflow and throttle response. Flows roughly 40% better than stock, is compatible with drop-in IHI turbos, and fits intake systems using a 4" boot connection. Includes mounting hardware and custom powder coat finish.
Wehrli 01-04 Duramax LB7 4in High Flow Intake Horn - WCFab Red
