WCFab 4 in. High Flow Cast Aluminum Turbo Intake Horn for 2017-2025 GM 2500/3500 (6.6L) - Grey

Fits 2017-2025 Chevrolet Silverado and GMC Sierra 2500/3500 HD trucks equipped with the 6.6L Duramax L5P engine.

The WCFab 4 in. High Flow Cast Aluminum Turbo Intake Horn is a precision-engineered solution for the restrictive factory plastic turbo mouthpiece. Featuring a true 4-inch inlet and a smooth internal transition to an anti-surge face, this bolt-on upgrade increases the flow area at the compressor inlet by 25% and improves overall flow by 27% over stock. The CNC-machined cast aluminum construction ensures superior durability and provides a more aggressive engine and turbocharger sound without the need for aftermarket tuning.

• True 4" inlet with anti-surge face for optimized compressor engagement
• CNC machined cast aluminum construction with WCFab Grey powder coat finish
• Includes #10 ORB threaded billet aluminum hose barb for PCV system connection
• O-ring seal at the turbocharger face for a secure, leak-free fit
• Flows 27% better than the factory mouthpiece
• Compatible with stock and OEM-style drop-in turbochargers
• Replaces OE turbo inlet 12678756 (GM part numbers 19432816 and 12682569)
• Compatible with 2019-2024 L5D 6.6L Duramax in 4500/5500/6500 Medium Duty trucks
• Includes all necessary mounting hardware
• Manufacturer Part Number: WCF100775-GRY