WCFab 4 in. High Flow Cast Aluminum Turbo Intake Horn for 2017-2025 GM 2500/3500 (6.6L) - Gloss White - WCF100775-GW

Fits 2017-2025 Chevrolet Silverado and GMC Sierra 2500/3500 HD trucks equipped with the 6.6L Duramax Diesel (L5P), including 2019-2024 Medium Duty 4500-6500 (L5D) models.

Upgrade your 6.6L Duramax with the WCFab High Flow Cast Aluminum Turbo Intake Horn. This 4-inch inlet replaces the restrictive factory plastic mouthpiece to provide a 25% larger flow area at the compressor inlet and 27% better airflow overall compared to stock. Designed with a strategic anti-surge face that properly engages the turbo compressor cover, it optimizes airflow and drivability for both stock and OEM-style aftermarket drop-in turbochargers.

Constructed from CNC-machined cast aluminum for superior durability, this intake horn features an O-ring seal at the turbocharger face for a leak-free fit. It includes a #10 ORB threaded billet aluminum hose barb for a secure PCV system connection. This is a direct bolt-on upgrade that requires no tuning and is compatible with both factory and aftermarket cold air intake systems.

• Manufacturer Part Number: WCF100775-GW
• Replaces GM Part Numbers: 12678756, 19432816, 12682569
• Material: CNC Machined Cast Aluminum
• Finish: Gloss White Powder Coat
• Inlet Size: 4-inch
• Flow Increase: 27% better than stock
• Included Hardware: Mounting hardware and O-ring seal
• Origin: Made in USA