4K Governor Springs for Bosch P7100 Injection Pump (12v Cummins)

Increase your engine’s RPM capability and unlock more top-end performance with 4K Governor Springs for the Bosch P7100 injection pump. This performance upgrade allows 12 valve Cummins engines to rev to approximately 4,000 RPM, extending the usable powerband and supporting high-performance diesel builds.

The 4K governor spring upgrade is a popular modification among diesel enthusiasts, racers, and performance builders who want their P7100 injection pump to maintain fueling at higher engine speeds. When paired with upgraded injectors, turbochargers, and fuel system modifications, these springs help maximize horsepower potential and improve throttle response.

Designed for reliability and consistent governor operation, these springs are ideal for performance trucks, competition vehicles, and modified street setups.

Key Features

Raises RPM Limit to ~4,000 RPM
Allows the engine to maintain fuel delivery at higher RPM levels compared to the factory governor setup.

Designed for Bosch P7100 Injection Pumps
Compatible with the mechanical P7100 injection pump used in 12v Cummins diesel engines.

Improved Performance and Powerband
Helps extend the usable RPM range, improving acceleration and top-end performance.

Performance Diesel Upgrade
Ideal for high horsepower builds, racing applications, and modified street trucks.

Durable Spring Construction
Manufactured from high-quality materials designed to perform reliably in high-demand diesel injection systems.

Important Installation Note

For engines running 4K governor springs, it is recommended to upgrade to 150 lb valve springs to help prevent valve float at higher RPM levels. Upgrading valve springs helps maintain proper valve control and ensures reliable engine operation when increasing the engine’s rev limit.

Applications

These 4K governor springs are commonly used in:

• 12v Cummins performance builds

• Diesel drag racing trucks

• Sled pulling trucks

• High horsepower street trucks

• P7100 injection pump upgrades

Vehicle Compatibility

Compatible with engines equipped with the Bosch P7100 injection pump, including:

• 1994–1998 Dodge Ram 2500 12v Cummins

• 1994–1998 Dodge Ram 3500 12v Cummins

Benefits of Upgrading to 4K Governor Springs

Installing 4K governor springs allows your engine to maintain fueling at higher RPMs, which helps support performance modifications and keeps the engine in its optimal power range.

Benefits include:

• Higher usable RPM range

• Stronger top-end power

• Improved throttle response

• Better performance with upgraded injectors and turbochargers

• Increased tuning flexibility for performance builds

Product Highlights

• 4K Governor Spring Upgrade

• Raises RPM limit to approximately 4,000 RPM

• Designed for Bosch P7100 injection pump

• Compatible with 12 valve Cummins engines

• Ideal for high-performance diesel applications