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T304 Stainless Steel
The Purest Stainless Steel used in Exhaust System Manufacturing
High Rust Resistance
Lasts Up To 20+ years
Looks Better

T409 Stainless Steel
The Standard Stainless Steel used in Exhaust System Manufacturing
Low Rust Resistance
Lasts Up To 5-8 Years
Looks Dull
Attention
A 2022 Cummins Tune Package was added to your cart. This tune is a beta tune that may cause the following:
- Low power
- Poor fuel mileage
- Engine codes that may appear
- Poor shifting characteristics
For a tested and proven tune, please view our Ram Cummins 6.7L All-in-One DPF/DEF/EGR Delete Kit w/ECM Swap (2022-2024)
The GM Duramax L5P Turbo Intake Horn is a high-performance upgrade designed to replace the fragile plastic factory turbo inlet on 2017–2025 GMC Sierra and Chevy Silverado HD trucks with the 6.6L Duramax L5P engine. Built from durable steel and finished in a sleek black powder coat, this intake horn delivers improved airflow, durability, and compatibility with both stock and aftermarket turbos.
Key Features
- Upgraded Construction: Replaces the OEM plastic turbo inlet with a robust, black powder-coated steel alternative that resists heat, cracking, and long-term wear.
- Improved Airflow: Engineered to reduce restriction and increase airflow to the turbocharger, resulting in better throttle response and performance.
- Drop-In Fit: Designed as a direct replacement for the factory turbo intake horn—no modifications or tuning required.
Benefits
- Enhanced Durability: The factory plastic inlet is known to become brittle and fail over time. This steel upgrade provides long-lasting reliability under extreme conditions.
- Performance Boost: Increased airflow contributes to more efficient turbo spool-up and improved power output, especially when paired with performance upgrades.
- Compatible with Stock or Aftermarket Turbos: Whether you're running the stock turbo or an upgraded unit, this intake horn ensures seamless fitment and optimal airflow.
Installation & Compatibility
- Vehicle Fit: Fits all 2017–2025 GMC Sierra and Chevy Silverado 2500/3500 HD trucks equipped with the 6.6L Duramax L5P engine.
- Easy Installation: Installs quickly using basic hand tools with no tuning required—ideal for DIYers and performance shops alike.
Important Product Information
Off-Road Use Only: The products sold on this website are intended for off-road use only, and may not be legal for use on public highways where pollution control laws apply.
Check Local Laws: Before purchasing and installing any of these parts, please check your local and state laws to confirm whether the modifications are legal in your area.
Professional Installation Recommended: These kits and parts are strongly recommended to be installed by professional mechanics only. Improper installation may lead to performance issues or damage to your vehicle. Unless specified differently on the product page, our parts do not include installation instructions. They are intended for individuals with a proficient understanding of mechanical systems and procedures. Like many aftermarket parts compatible with a variety of vehicles, minor adjustments or modifications may be necessary during the installation process. We cannot accept returns or offer refunds on the basis of an inability to complete the installation due to the absence of instructions.
Warranty: The use of these parts will void the warranty of your vehicle. Please confirm with your vehicle manufacturer before purchase and installation.
No Liability: Tuner Depot is not responsible for any damage or issues that may arise from the use of these parts.
Product Images: Product images are for illustrative purposes only and may differ from the actual product due to manufacturer design changes or improvements.
No Performance Guarantees: While these parts are designed to enhance the performance of your vehicle, no guarantees are made regarding the specific performance gains that will be achieved.
Shipping Policy at Tuner Depot
At Tuner Depot, we understand the importance of timely delivery for your performance parts. We're committed to ensuring a seamless shipping experience, striving to dispatch your orders with utmost efficiency and speed.
- Weather Conditions: Adverse weather conditions such as rain, snow, or sleet may affect delivery timelines. We will make every effort to minimize any delays.
- Holiday Periods: Please note that our shipping center will be closed during holidays. We will resume shipping promptly on the next business day. Allow for potential delays during peak seasons, but rest assured, we will keep you informed every step of the way.
- Staff Availability: Unforeseen circumstances can occasionally affect our staffing levels, possibly leading to minor delays. We are committed to swiftly resolving any issues to maintain our high standards of service.
- Choosing a selection results in a full page refresh.