Wehrli - WCF100721-GRY
Wehrli Custom Fab Intake Horn, 3.5in., for 17-19 Duramax L5P, WCFab Grey
3 1/2" Turbo Intake Horn for the 2017-2019 L5P Duramax with factory style Turbo. The OEM plastic intake horn is 2.4" diameter and we experienced a 25HP Gain with our 3.5" Horn when used with a Max Effort Tune. Tuning not required, this horn will work with plug and play tuners or OEM calibration.