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
-INCLUDES provision for the OEM PCV Line connection. -NO Tuning required, bolt on! -Will fit with OEM or any aftermarket intake kit. -Will fit on stock truck no other modifications or upgrades necessary!
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