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The Wehrli WCFab 4" cast aluminum intake horn fits 2001–2004 Chevrolet Silverado and GMC 2500/3500 HD trucks with the 6.6L LB7 Duramax and replaces the restrictive OEM inlet to boost turbo airflow. Compatible with stock or drop-in IHI turbos and intake systems using a 4" boot connection, it flows approximately 40% better than stock and includes mounting hardware and a custom powder coat finish. Made in USA.
Wehrli 01-04 Duramax LB7 4in High Flow Intake Horn - Bengal Gray
