1994–1998 12 Valve Cummins AFC Spring Kit (P7100 Injection Pump)

Improve fuel control and boost-driven fueling performance with the 1994–1998 12 Valve Cummins AFC Spring Kit. Designed for the Bosch P7100 injection pump, this upgraded spring provides a stiffer spring rate that allows for a slower, more controlled ramp of fueling in higher boost performance applications.

By improving how the AFC (Air Fuel Control) system responds to boost pressure, this kit helps deliver smoother fueling transitions and improved efficiency, especially on trucks equipped with upgraded turbochargers and performance fuel system modifications.

This complete AFC spring kit is a simple yet effective upgrade for diesel enthusiasts looking to fine-tune fueling control while supporting higher boost levels.

Key Features

Stiffer AFC Spring for Better Fuel Control
Designed with a stiffer spring to allow for more controlled fueling as boost increases, improving drivability in performance applications.

Improved Fueling Efficiency
Helps optimize fuel delivery by better matching fueling ramp to boost pressure.

Designed for P7100 Injection Pumps
Compatible with the Bosch P7100 injection pump used on 1994–1998 12 valve Cummins engines.

Complete Installation Kit
Includes everything needed to upgrade the AFC spring within the injection pump.

Performance Benefits

Upgrading the AFC spring can help improve how fueling responds to boost pressure, which is especially beneficial for trucks running modified fueling setups.

Benefits include:

• More controlled fuel ramp under boost

• Improved throttle response

• Better drivability in performance setups

• Increased fueling efficiency

• Ideal for trucks with turbo or injector upgrades

Applications

This Cummins AFC Spring Kit is commonly used for:

• 12 valve Cummins performance builds

• P7100 injection pump tuning

• Turbo upgrade setups

• Fuel system modifications

• Diesel performance tuning

Vehicle Compatibility

Compatible with 1994–1998 Dodge Ram Cummins trucks, including:

• 1994–1998 Dodge Ram 2500 5.9L 12 Valve Cummins

• 1994–1998 Dodge Ram 3500 5.9L 12 Valve Cummins

Also compatible with various industrial and agricultural engines using the Bosch P7100 injection pump.