Wehrli Custom Fabrication WCF100775-KIWI High Flow Cast Turbo Intake Horn Kiwi

The Wehrli Custom Fabrication WCF100775 High Flow Cast Turbo Intake Horn in Kiwi powder coat is a direct-fit, bolt-on upgrade for the GM 6.6L Duramax L5P diesel engine. This cast aluminum turbo intake horn replaces the restrictive factory plastic turbo mouthpiece to deliver increased airflow to the turbocharger for improved engine performance and throttle response.

Key Features:

• Flows 27% better than stock for measurable performance gains
• True 4" inlet with a smooth-flowing transition to a strategically designed anti-surge face that properly engages the turbo compressor cover for optimized airflow and drivability
• 25% greater flow area than OEM at the compressor inlet
• CNC machined cast aluminum construction for increased durability and a more aggressive turbo and engine sound
• Compatible with stock VGT turbochargers and OEM-style aftermarket drop-in turbochargers with larger compressor wheels
• Includes #10 ORB threaded billet aluminum hose barb for PCV system connection
• O-ring seal at the face of the turbocharger for a leak-free fit
• Includes all necessary mounting hardware
• Works with OEM and aftermarket cold air intake systems
• Emissions compliant — no tuning required, fits stock trucks with no additional modifications
• Finished in WCFab's signature Kiwi custom powder coat
• Made in the USA

Replaces GM turbo inlet part numbers 12678756, 19432816, and 12682569. Supersedes WCFab part numbers WCF100721 and WCF100833. Also compatible with the L5D 6.6L Duramax found in 2019–2025 GM Medium Duty (4500, 5500, 6500) trucks.

Modified trucks can see up to a 10 HP increase, while applications running upgraded turbochargers can experience as much as a 20 HP increase. Pair with WCFab Stage 1 Cold Air Intake Kits or Stage 1 High Flow Bundle Kits for maximum performance gains.