DDP DDP4BTP-3 CUMMINS P-PUMP 4BT STAGE 3 INJECTOR SET

The DDP 4BTP-3 injector set is a complete, drop-in replacement for Cummins 4BT engines with the Bosch P7100 (P-pump), offering a modest but noticeable increase in performance, fuel atomization, and efficiency. Featuring 3-hole nozzles, these injectors are perfect for users seeking improved throttle response and light power gains without sacrificing fuel economy or daily drivability.

Ideal for tow rigs, step vans, agricultural machines, and even custom swaps looking for a mild performance upgrade with no tuning required (though tuning is beneficial).

Vehicle / Engine Fitment

• Cummins 3.9L 4BT with Bosch P7100 Mechanical Injection Pump

• Common in:

  • Step vans, construction equipment

  • Industrial and ag machines

  • Engine swaps (Jeeps, hot rods, off-road builds)

Not compatible with VE-pump or electronic fuel systems.

Key Features

• Complete injectors – set of 4

•  Equipped with 3-hole nozzles for mild fuel increase

•  Direct replacement for P-pumped 4BTs

•  Adds ~30–40 horsepower with improved throttle response

•  Works with stock turbo and pump setups

•  Flow-tested and matched for consistency

•  Assembled in the USA with OEM-quality components

Recommended Pairings

• Mild injection pump tuning (optional)

• Stock or small upgrade turbo (e.g., HX30/35)

• Free-flowing exhaust

• Intake improvements (open intake, intercooler)

Perfect for Reliable Power

The DDP 4BTP-3 injector set is perfect for users looking for reliable, light performance gains from their 4BT engine. With great drivability and no need for extensive supporting mods, these injectors deliver smoother operation and better responsiveness.