The WCFab L5P 4 in. High Flow Cast Aluminum Turbo Intake Horn for 2017-2025 Chevrolet Silverado or GMC 2500 / 3500 HD trucks equipped with the 6.6L Duramax Diesel is the largest and highest flowing turbo inlet on the market. Replaces the restrictive OEM plastic turbo mouthpiece to provide increased airflow to your turbocharger for improved engine performance and throttle response. Includes billet aluminum port for PCV system connection. Custom powder coated in the color of your choice. All aluminum construction provides increased durability and more aggressive turbo and engine sound. Made in USA! Pair it with our Stage 1 L5P Cold Air Intake Kits and Stage 1 High Flow Bundle Kits along with emissions compliant performance tuning and drop in performance turbochargers for maximum performance gains. - - Replaces the 12678756 turbo inlet in the following GM Part Numbers: 19432816 and 12682569 - - Supersedes WCFab part numbers: WCF100721 and WCF100833 - - Fitment Note: This product is also compatible with the L5D 6.6L Duramax found in 2019-2024 Medium Duty (4500, 5500, 6500) GM trucks.
Installation InstructionsThis Part Fits:
| Year |
Make |
Model |
Submodel |
| 2021-2025 |
Chevrolet |
Silverado 2500 HD |
Custom |
| 2017-2025 |
Chevrolet |
Silverado 2500 HD |
High Country |
| 2017-2025 |
Chevrolet |
Silverado 2500 HD |
LT |
| 2017-2025 |
Chevrolet |
Silverado 2500 HD |
LTZ |
| 2017-2025 |
Chevrolet |
Silverado 2500 HD |
WT |
| 2024-2025 |
Chevrolet |
Silverado 2500 HD |
ZR2 |
| 2017-2025 |
Chevrolet |
Silverado 3500 HD |
High Country |
| 2017-2025 |
Chevrolet |
Silverado 3500 HD |
LT |
| 2017-2025 |
Chevrolet |
Silverado 3500 HD |
LTZ |
| 2017-2025 |
Chevrolet |
Silverado 3500 HD |
WT |
| 2020-2025 |
GMC |
Sierra 2500 HD |
AT4 |
| 2024-2025 |
GMC |
Sierra 2500 HD |
AT4X |
| 2017-2021 |
GMC |
Sierra 2500 HD |
Base |
| 2017-2025 |
GMC |
Sierra 2500 HD |
Denali |
| 2024-2025 |
GMC |
Sierra 2500 HD |
Denali Ultimate |
| 2022-2025 |
GMC |
Sierra 2500 HD |
Pro |
| 2017-2025 |
GMC |
Sierra 2500 HD |
SLE |
| 2017-2025 |
GMC |
Sierra 2500 HD |
SLT |
| 2020-2025 |
GMC |
Sierra 3500 HD |
AT4 |
| 2017-2021 |
GMC |
Sierra 3500 HD |
Base |
| 2017-2025 |
GMC |
Sierra 3500 HD |
Denali |
| 2024-2025 |
GMC |
Sierra 3500 HD |
Denali Ultimate |
| 2022-2025 |
GMC |
Sierra 3500 HD |
Pro |
| 2017-2025 |
GMC |
Sierra 3500 HD |
SLE |
| 2017-2025 |
GMC |
Sierra 3500 HD |
SLT |
⚠️ California Proposition 65 Warning:
This product may expose you to chemicals known to the State of California
to cause cancer or reproductive harm.
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