DDP CP4-421 Remanufactured CP4 Injection Pump for Duramax LML

The DDP CP4-421 is a professionally remanufactured CP4 high-pressure fuel injection pump designed as a direct replacement for the factory CP4 pump. Built by Dynomite Diesel Products, this pump delivers stock power output and meets factory specifications while providing reliable performance for diesel fuel systems.

Key Features:

• Remanufactured to OEM specifications for reliable performance
• Direct bolt-in replacement for factory CP4 injection pump
• Stock power level output maintains factory fuel delivery
• Ready to install with all necessary components included
• Core charge applies - refundable upon return of rebuildable core
• 1-year unlimited mileage warranty included
• Professionally remanufactured by Dynomite Diesel in Washington State

Dynomite Diesel Products applies the same precision engineering and quality standards used in their performance fuel injection components to ensure this stock replacement CP4 pump delivers dependable, long-lasting service. Each remanufactured unit is thoroughly inspected and tested to meet stringent quality control standards.