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 plug and play tuners or OEM calibration.
- Will fit with OEM or any aftermarket intake kit.
- DOES NOT have provision for the OEM PCV Line. A PCV Reroute kit must but purchased or sourced separately. If you do not already have your PCV Rerouted it is recommended to purchase WCF100470 which is horn and pcv reroute combined.
- Tuning recommended.
See WCF100721 Horn with PCV Port as a bolt on alternative for stock trucks with no tuning required.