3.5in Intake Horn

The Wehrli Custom Fab 3.5-inch Intake Horn (WCF100721) is designed to replace the restrictive factory plastic intake horn on 2017-2019 Chevrolet 6.6L L5P Duramax engines. This aluminum-constructed horn boasts a 3.5-inch diameter, significantly larger than the OEM 2.4-inch horn, to promote increased airflow to the turbocharger. While not strictly requiring tuning, this intake horn is compatible with plug-and-play tuners or the OEM calibration. For those utilizing a 'Max Effort Tune,' a 25HP gain has been experienced with this 3.5-inch horn. The product is available in multiple powder coat finishes, including the featured WCFab Red. This intake horn is specifically designed for the 2017-2019 L5P Duramax with the factory-style turbo. It is available in various colors, such as WCFab Red, WCFab Grey, Bengal Red, and Flat Black.