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The WCFab 4" High Flow Turbo Intake Horn for 2017–2025 Chevrolet Silverado and GMC 2500/3500 HD trucks with the 6.6L Duramax (L5P) replaces the restrictive OEM inlet to increase airflow to the turbocharger. CNC cast aluminum construction, a billet PCV port, and an O-ring seal at the compressor face improve flow and durability. It's a bolt-on upgrade that works with stock trucks and many drop-in turbochargers for stronger throttle response.
Wehrli 17-24 Duramax L5P High Flow Intake Horn - WCFab Red
