Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
The WCFab 4‑inch high‑flow cast aluminum turbo intake horn replaces the restrictive OEM plastic inlet on 2017–2025 Silverado and Sierra 2500/3500 HD trucks with the 6.6L Duramax (L5P) to increase compressor inlet flow and throttle response. CNC‑cast aluminum construction, a billet PCV port and O‑ring face seal improve durability and airflow; it bolts on without tuning, fits stock and many aftermarket drop‑in turbochargers, and is made in the USA.
Wehrli 17-24 Duramax L5P High Flow Intake Horn - Kiwi Green
