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Wehrli's 4" WCFab high-flow cast aluminum turbo intake horn for 2001–2004 Chevrolet Silverado and GMC 2500/3500 HD trucks with the LB7 6.6L Duramax replaces the OEM inlet to provide improved airflow and throttle response. It flows around 40% better than stock, works with stock and drop-in IHI turbos, requires a 4" boot connection with bead roll, and ships with mounting hardware and a custom powder coat finish.
Wehrli 01-04 Duramax LB7 4in High Flow Intake Horn - Bengal Silver
