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 (Dyno comparison above) with our 3.5" Horn when used with a Max Effort Tune. Tuning NOT required, this horn will work plug and play tuners or OEM calibration. Kit Includes PCV Hose and fitting to reroute the PCV.
-NO Tuning required, bolt on!
-Will fit on stock truck no other modifications or upgrades necessary!