GM Duramax L5P 6.6L - Turbo Intake Horn (2017-2025)
Type: Intake Horn | Fits: GM Duramax
Upgrade airflow and durability at the turbo inlet.
This steel turbo intake horn replaces the brittle OEM plastic inlet found on 2017–2025 GM 6.6L Duramax L5P trucks. Finished in black powder coat and built to withstand heat, vibration, and high-boost pressure, it delivers smoother airflow and longer service life—no tuning required.
The factory turbo inlet on L5P Duramax trucks is known to degrade and crack over time, especially under heavy load or performance tuning. This steel intake horn upgrade solves that weakness with a high-strength design that installs easily and works with stock or aftermarket turbochargers. Ideal for high-mileage trucks, performance builds, or preventative upgrades.
Vehicle Fitment
Compatible Vehicles
- 2017–2025 Chevrolet Silverado 2500HD / 3500HD with 6.6L Duramax L5P
- 2017–2025 GMC Sierra 2500HD / 3500HD with 6.6L Duramax L5P
This intake horn is a direct replacement for the OEM turbo inlet on all L5P configurations.
Specifications
| Feature | Description |
|---|---|
| Material | Powder-coated steel |
| Finish | Black powder coat for corrosion and heat resistance |
| Fitment | Direct bolt-on replacement for OEM turbo intake horn |
| Compatibility | Works with stock and aftermarket turbochargers |
| Tuning Requirement | None – installs with factory calibration |
What’s Included
- Steel turbo intake horn (L5P-specific)
- Black powder-coated finish
- OE-style mounting points
- Installation hardware (if applicable)
Key Features
- Replaces OEM plastic inlet prone to cracking and failure
- Built from steel for superior strength under high-boost conditions
- Black powder-coated finish offers durability and clean under-hood appearance
- Improves airflow into the turbocharger for better throttle response
- Works with both factory and upgraded turbos
- No tuning or modifications required for installation
Benefits
- More consistent power delivery by reducing inlet restriction
- Eliminates known weak point in the factory air system
- Reduces risk of boost leaks and premature seal failure
- Improves long-term reliability under towing or performance load
- Adds aggressive, functional styling to your engine bay
Installation Notes
- Bolts directly in place of the OEM intake horn
- Compatible with factory clamps and couplers
- Basic hand tools required
- No tuning necessary—plug-and-play upgrade
Important Notes:
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Important Notices
- Off‑Road Use Only
Products sold by JS Speed are intended for off‑road use and may be illegal on public roads where emissions or pollution‑control laws apply. - Check Local Laws
Before purchasing or installing, verify all applicable local, state/provincial, and federal regulations to ensure the modification is legal in your area. - Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicle’s factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.
