3.5 in. Turbo Intake Horn for the 2020-2024 L5P Duramax with factory style Turbo. The OEM plastic intake horn is 2.4 in. diameter and we experienced a 25HP Gain with our 3.5 in. Horn when used with a Max Effort Tune. Tuning not required, this horn will work plug and play tuners or OEM calibration.

Installation Instructions

This Part Fits:

Year	Make	Model	Submodel
2021-2024	Chevrolet	Silverado 2500 HD	Custom
2020-2024	Chevrolet	Silverado 2500 HD	High Country
2020-2024	Chevrolet	Silverado 2500 HD	LT
2020-2024	Chevrolet	Silverado 2500 HD	LTZ
2020-2024	Chevrolet	Silverado 2500 HD	WT
2024	Chevrolet	Silverado 2500 HD	ZR2
2020-2024	Chevrolet	Silverado 3500 HD	High Country
2020-2024	Chevrolet	Silverado 3500 HD	LT
2020-2024	Chevrolet	Silverado 3500 HD	LTZ
2020-2024	Chevrolet	Silverado 3500 HD	WT
2020-2024	GMC	Sierra 2500 HD	AT4
2024	GMC	Sierra 2500 HD	AT4X
2020-2021	GMC	Sierra 2500 HD	Base
2020-2024	GMC	Sierra 2500 HD	Denali
2024	GMC	Sierra 2500 HD	Denali Ultimate
2022-2024	GMC	Sierra 2500 HD	Pro
2020-2024	GMC	Sierra 2500 HD	SLE
2020-2024	GMC	Sierra 2500 HD	SLT
2020-2024	GMC	Sierra 3500 HD	AT4
2020-2021	GMC	Sierra 3500 HD	Base
2020-2024	GMC	Sierra 3500 HD	Denali
2024	GMC	Sierra 3500 HD	Denali Ultimate
2022-2024	GMC	Sierra 3500 HD	Pro
2020-2024	GMC	Sierra 3500 HD	SLE
2020-2024	GMC	Sierra 3500 HD	SLT