Dynomite Diesel L5P-STK Brand New Stock Injector – 2017–2023 6.6L Duramax L5P

Restore factory reliability and performance to your 2017–2023 6.6L Duramax L5P with the Dynomite Diesel L5P-STK brand-new stock replacement injector.

This is a direct-fit, OEM-style replacement for worn or failed factory injectors. Sold individually (order 8 for a complete set), the L5P-STK is built as a new injector—not remanufactured—to deliver precise fuel atomization, consistent spray pattern, and stock-level output. It helps eliminate common symptoms such as hard starts, rough idle, misfires, loss of power, and reduced fuel economy.

Key Features

• Brand-new construction for long-term durability
• Direct replacement—no modifications required
• Restores original fuel delivery, efficiency, and drivability
• Precision-engineered for the L5P’s high-pressure common-rail system
• American-made by Dynomite Diesel in Idaho
• 3-year warranty
• Core charge applies (refundable upon return of your old injector)

Fitment: 2017–2023 Chevrolet Silverado 2500HD / 3500HD and GMC Sierra 2500HD / 3500HD equipped with the 6.6L Duramax L5P engine.

Whether you’re replacing a single failed injector or refreshing the entire set, the Dynomite Diesel L5P-STK gives you a high-quality, drop-in solution that returns your truck to reliable stock performance. Supercedes the previous L5PNEW part number.