Unlock extra power, better mileage, and cleaner operation in your first-gen Cummins with the Dynomite Diesel (DDP) Stage 1 Injector Set.

The DDP 8993-1 Stage 1 injectors are a brand-new, precision-matched set of 6 designed for 1989–1993 Dodge Ram 5.9L 12-valve Cummins engines (VE rotary pump). They deliver a noticeable performance upgrade without the excessive smoke or poor street manners of more aggressive sets.

These injectors typically add around 50 horsepower over stock and can support up to 275 RWHP when paired with proper supporting modifications. Many owners also report a 1–2 MPG improvement once the truck settles in, along with sharper throttle response and better turbo spool.

Key Features

• Approximately 50 HP gain over stock
• Supports up to 275 RWHP with supporting mods
• Brand-new matched set — no core charge
• Patented Pilot Hole Technology (5 main holes + 2 × 0.005" pilot holes)
• SAC-style nozzles for improved atomization
• Excellent smoke control and reduced idle haze
• 245 BAR pop pressure
• Includes 1.5 mm copper washers
• Balanced and flow-matched for smooth, even operation

The small pilot holes introduce fuel more gradually. This helps the turbo spool quicker, improves drivability, and keeps exhaust cleaner compared to simple hole-size increases.

Fitment

• 1989–1993 Dodge D250, D350, W250, W350
• 5.9L 12-valve Cummins (first-generation, VE pump)

Important: An upgraded fuel pin (DDP PIN) should be installed in the VE rotary injection pump. Without it, you will see little to no power gain from the injectors.

Why Stage 1?

Stage 1 is the sweet spot for daily-driven or moderately modified first-gens. You get a real, usable increase in power and towing capability while retaining the mechanical reliability and relatively clean character that made the 12-valve Cummins famous. They work well on stock or lightly modified trucks and pair nicely with other common upgrades.

Sold as a complete new set with a typical 1-year unlimited-mileage warranty. Ready to drop in and wake up your 5.9.