Product Description
S&S Diesel 325-350SAC-SET is a brand-new (not reman) set of six 350% over injectors engineered for the late 5.9L Cummins common-rail (2004.5–2007). Built by S&S Diesel Motorsport with honed SAC nozzles and tight flow matching, this set delivers the fuel volume demanded by top-tier competition builds.
Fitment
- 2004.5–2007 Ram 2500/3500 with 5.9L Cummins 24V (late 5.9 common-rail)
- Direct replacement format; requires appropriate tuning and supporting fuel/air upgrades for safe operation at 350% over.
Why S&S Diesel?
- Proprietary SAC nozzle honing and tight flow-matching for consistent cylinder-to-cylinder fueling.
- Injector build spec matched to nozzle flow; higher sizes include internal body mods to improve rate shape.
- Built by one of the leaders in high-performance common-rail fuel systems.
What’s Included
- (6) NEW S&S Diesel injectors – 325-350SAC-SET (350% over)
- Set is flow-matched and ready for professional installation and tuning
Recommended Supporting Parts (CPP-only links)
- 03–07 Cummins CP3 Injection Pumps — high output/dual fuel recommended for 350% injectors.
- Injector Feed/Supply Tubes (OE) — replace to ensure proper sealing and rail pressure.
- Fuel Rail Pressure Relief Valve (PRV) — maintains commanded rail pressure under high flow.
- Head Studs / Fastener Upgrades — added cylinder pressure control for high-fuel builds.
- All S&S Injectors for 03–07 Cummins — compare sizes and options.
Tuning & Setup Notes
- Custom ECU calibration is mandatory to manage pulse width, rail pressure, and smoke control.
- Match with adequate turbo airflow (e.g., S300/S400 or compound systems) and robust CP3 supply.
- Use clean fuel, new feed tubes, and verify return rates per cylinder during installation.
Warranty
S&S Diesel Motorsport products carry a 2-year, unlimited-mileage warranty from date of sale (transferable to subsequent owners within that period). Any suspect hardware must be returned to S&S for evaluation.
FAQ
What does “late 5.9” mean for fitment?It refers to the 2004.5–2007 common-rail 5.9L Cummins architecture used in Ram 2500/3500. If your build is 2003–early 2004, see our early 5.9 options.
Is 350% over streetable?
These are competition-level injectors. They require significant airflow (large single or compounds), high-capacity fueling (often dual CP3), and professional tuning. Not recommended for daily-driven stock turbo/stock pump setups.
Do I need new injector feed tubes?
Yes—replacing feed/supply tubes is strongly recommended to ensure sealing and prevent return leakage under high rail pressure. See our OE feed tube listing above.
Are these matched as a set?
Yes. S&S flow-matches nozzles and injectors to tight tolerances for consistent fueling across cylinders.
What tuning is required?
Custom calibration to manage pulse width, timing, and rail pressure. Work with a reputable Cummins tuner familiar with high-flow S&S hardware.
