Fuel System Replacement Kit | 2013–2018 RAM 6.7L Cummins Cab Chassis

The AP57021 Fuel System Replacement Kit is the ultimate solution for restoring the complete fuel system in your 2013–2018 Ram 3500, 4500, and 5500 Cab Chassis trucks equipped with the 6.7L Cummins diesel engine.

Whether your truck’s system has been compromised by DEF (Diesel Exhaust Fluid) misfueling, water intrusion, or other contaminants, this kit provides a full-system refresh with OE or OE-equivalent components from trusted names like Bosch, Cummins, and Alliant Power.

With this kit, you can return your hard-working Ram to peak performance, confident you’re using the highest-quality replacement parts available.

Key Features & Benefits

3-Year, Unlimited-Mile Warranty — industry-leading protection for peace of mind.

OE & OE-Equivalent Components — all parts validated to meet or exceed OEM standards.

Comprehensive Quality Testing — each fuel system component undergoes 15 end-of-line tests to guarantee zero leakage and optimal performance.

Convenient All-in-One Solution — everything you need for a complete fuel system repair in one box.

USA Assembled — proudly built in an ISO 9001:2015 Certified Facility for unmatched reliability.

 

What’s Included

6 × Alliant Power Remanufactured Fuel Injectors

1 × Bosch Remanufactured CP3 High-Pressure Fuel Pump

1 × Bosch High-Pressure Fuel Rail

6 × Fuel Injector Inlet Connector Tubes

6 × Fuel Rail-to-Injector Lines

1 × High-Pressure Pump-to-Rail Line

1 × Intake Manifold Gasket

(All components are OE or OE-validated for maximum durability and performance.)

 

Fitment Applications

This kit is specifically designed for:

2013–2018 Ram 3500 Cab Chassis (6.7L Cummins)

2013–2018 Ram 4000 Cab Chassis (6.7L Cummins)

2013–2018 Ram 4500 Cab Chassis (6.7L Cummins)

2013–2018 Ram 5500 Cab Chassis (6.7L Cummins)

 

Why Choose AP57021 for Your Ram?

Complete System Refresh: Replaces every major fuel system component in one installation.

Built for Durability: OE or OE-equivalent parts from Bosch, Cummins, and Alliant Power ensure lasting performance.

Protects Against Future Failures: Eliminates hidden damage caused by fuel contamination.

Fleet & Shop Friendly: Reduces downtime with a pre-packaged, ready-to-install solution.

 

Q&A

How do I fix fuel contamination in my 2015 Ram 6.7 Cummins?

Install a complete fuel system replacement kit like AP57021 to replace the injectors, pump, rails, and lines.

What comes in the AP57021 fuel system kit?

Six reman injectors, Bosch CP3 pump, high-pressure rail, injector tubes, rail lines, pump-to-rail line, and gaskets.

Is the AP57021 kit compatible with Ram 5500 trucks?

Yes, it fits 2013–2018 Ram 3500, 4500, and 5500 Cab Chassis models with the 6.7L Cummins engine.