Engineered specifically for 2003 through 2007 Dodge Ram 2500 and 3500 trucks equipped with the 5.9L 24-valve common-rail Cummins turbo diesel engine, the Industrial Injection OE Spec Plus 120% Over 12mm Remanufactured CP3 Injection Pump (0986437304DD) provides massive high-pressure fuel delivery for high-output street and competition applications. When building past 550 horsepower with oversized injectors and high-flow turbo configurations, the factory CP3 pump cannot keep up with duration demands, resulting in rail pressure drop and lost horsepower.

Industrial Injection builds their OE Spec Plus modified reman series inside certified clean rooms using genuine Bosch pump cores and OEM test equipment. Every internal reciprocating wear component is upgraded with a precision-ground 12mm stroker eccentric shaft, enlarged pumping plungers, and hardened low-friction surfaces. By delivering 120% more fuel volume per revolution than stock, the 0986437304DD pump sustains rock-solid rail pressure through wide-open throttle (WOT) to comfortably fuel builds producing up to 1,050+ rear-wheel horsepower while retaining the factory 5.9L drop-in port layout.

Key Features & Benefits

• +120% Fuel Flow Volume: Displaces more than double the fuel of a factory stock 5.9L CP3, preventing rail pressure drain under maximum load.
• 12mm Stroker Assembly: Fitted with a precision-machined 12mm stroker shaft and enlarged pumping elements to maximize fuel volume per revolution.
• OE Spec Plus Precision Remanufacturing: Built, assembled, and calibrated to exceed OEM standards using certified test equipment.
• Supports Up to 1,050+ Horsepower: Delivers the volume required for aggressive performance tunes, large competition injectors, and compound turbo setups.
• Drop-In 5.9L Architecture: Features factory top-mounted fuel feed ports for seamless direct fitment to stock brackets and hard lines with zero custom line fabrication.
• Pre-Calibrated Fuel Control Actuator: Includes a brand-new Bosch FCA / MPROP metering valve pre-installed and balanced for precise rail pressure management.

Technical Specifications

• Manufacturer / Brand: Industrial Injection Diesel Performance
• Manufacturer Part Number / SKU: 0986437304DD
• Related Part Numbers: 0986437304DDSE / 0986437304-DD / IIS0986437304DD
• Bosch Base Part Number: 0 986 437 304 / 0445020011 / 0445020147
• Pump Series: OE Spec Plus Double Dragon 120% Over Series
• Displacement / Stroke: 12mm Stroker Assembly (+120% Flow Over Stock)
• Horsepower Rating: Up to 1,050+ RWHP (Injector & Lift Pump Dependent)
• Truck Platform: 2003–2007 Dodge Ram 2500 & 3500
• Engine Platform: 5.9L 24V Cummins Common-Rail Turbo Diesel
• Core Requirement: Core Return Required (Standard Bosch CP3 Core Return Policy)
• Warranty: Industrial Injection 1-Year / Unlimited Mileage Manufacturer Warranty

Vehicle Fitment & Technical Installation Notes

• 2003–2007 Dodge Ram 2500 – 5.9L Cummins 24V Common-Rail Diesel
• 2003–2007 Dodge Ram 3500 – 5.9L Cummins 24V Common-Rail Diesel
• Fits Model Years: 2003, 2004, 2004.5, 2005, 2006, 2007
• Fitment Notice: Direct bolt-on replacement for factory gear-driven engine block mounting on 2003–2007 5.9L common-rail engines. Uses factory mounting studs and drive gear.
• Fuel Supply Requirement: A high-volume aftermarket lift pump system rated at 165 to 200+ GPH (such as FASS Titanium or AirDog II-5G) with minimum 1/2" supply lines and a fuel tank sump or draw straw is required to prevent pump cavitation.
• Tuning Requirement: Custom ECM tuning (EFI Live, HP Tuners, or Smarty Touch) is mandatory to properly scale the fuel control actuator duty cycle and fuel pressure curves.