2013-2018 Cummins CDT Injector Set (21D901S)
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Description
Description
The Industrial Injection 21D901S is a six-injector set of Clean Diesel Technology (CDT) 10% over injectors for the 2013-2018 6.7L Cummins Ram 2500/3500. Each injector matches the 21D901 single — 10% more fueling volume over stock, drop-in with no tuning required, and CARB E.O. # D-711-1 covers the set so it stays 50-state legal. The set carries a core deposit refunded on return of the original injectors.
Features
Features
- Set of six CDT 10% over injectors
- Drop-in replacement — no tuning required
- Superior fuel atomization
- Emissions compliant — CARB E.O. # D-711-1
- 2-year warranty
Notes
Notes
- Sold as a complete set of six injectors.
- This product requires a core deposit (refunded on return of the original cores).
Questions and Answers
Questions and Answers
Previously asked questions
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What would be the best injector for towing whit a 64 mm turbo
Running a 64mm turbo and intended for towing, the CDT 30% Over (roughly 50–60 HP) injectors are generally considered the "sweet spot."


