OEM Stock Fuel Injector

Features:

• OEM Denso injector for 6.6L L5P Duramax
• Restores proper fuel delivery and performance
• Direct replacement for factory injector
• Ideal for high-mileage or failing injectors
• Ensures reliable combustion and engine efficiency
• Compatible with stock fuel systems
• Supports clean idle and smooth acceleration
• Not CARB-approved for California use
• Built to OEM standards for durability

OEM Stock Fuel Injector for GM 6.6L Duramax

If your L5P Duramax has been down on power, idling rough, or throwing injector codes, there's a good chance it's time to swap in a new set of injectors, or at least replace the one that's failing. The Industrial OEM Stock Fuel Injector is a direct-fit replacement built to the same standards as the original Denso injector found in 2017–2022 Silverado and Sierra 2500HD/3500HD trucks. Whether you’re chasing a drivability issue or doing preventative maintenance on a high-mileage workhorse, this injector delivers factory-spec performance and reliability you can count on.

Meets or Exceeds all OEM Specs

This isn’t a modified or remanufactured part, it’s an OEM-spec injector designed to restore your fuel system to like-new condition. That means smooth starts, consistent idle, clean throttle response, and proper fuel delivery across all load ranges. For trucks still running the stock turbo and tuning, this injector is the perfect match. You’re not adding fuel you don’t need, you’re simply getting back the performance and efficiency your truck had when it rolled off the lot.

Fits: 2017, 2018, 2019, 2020, 2021, 2022 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Notes:

• Fits 2017–2022 Silverado and Sierra 2500HD/3500HD 6.6L L5P Duramax.
• Passenger side cylinder head only, confirm side before ordering.
• Manufactured in Fleece’s Freedom Racing Engine facility for quality assurance.
• Built from a re-manufactured OE casting to match factory specs.
• Comes with new valves, guides, springs, and seals pre-installed.
• Each head is pressure and leak tested for reliability.
• Multi-angle valve job helps improve airflow and efficiency.
• No core charge required, you keep your original head.
• Recommended for use with GM Grade C head gasket (12727486).
• Professional installation by an experienced diesel technician is advised.
• Backed by a one-year limited parts warranty.