• Full set of 3K/4K governor springs
• Springs and bases (retainers) included
• These governor springs will allow higher rpm and more power in your P-pump truck.
• For a 3K kit, remove the center spring or leave it in for a 4K kit.
• We highly recommend installing heavy-duty 60lb valve springs if you plan on revving your engine to 3250RPM+

Enhance the performance and power of your Cummins diesel truck with Power Driven Diesel's high-quality 3K/4K Governor Springs Kit. Designed to increase rpm range, these springs are essential upgrades for diesel enthusiasts and truck owners seeking improved throttle response and engine efficiency.

Installation Made Easy

Installing our 3K/4K governor springs is a straightforward process that can be accomplished with basic tools and mechanical knowledge. The videos above demonstrate how we at Power Driven Diesel install the 3K/4K Governor Spring Kit with our optional Governor Spring Adjustment Tool.

Unleash the true potential of your Cummins diesel truck and experience enhanced performance like never before with the PDD 3K/4K Governor Springs. Upgrade your vehicle today and enjoy the power, efficiency, and reliability that these premium springs bring to your Cummins engine.

Compatible with P-pumped:

*May not work for all builds due to other engine/vehicle modifications

Frequently Asked Questions

What do governor springs do on a 12-valve Cummins?

They raise the RPM limit of the mechanical P7100 injection pump, allowing the engine to rev higher and produce more power. It's one of the most cost-effective performance modifications available for a 12-valve Cummins.

What's the difference between 3K and 4K governor springs?

3K springs raise the fuel cutoff to approximately 3,000 RPM; 4K springs push it to ~4,000 RPM. To select 3K, remove the center spring. Leave it in for 4K. The 4K setup is more aggressive and best suited for built engines with supporting modifications.

Will governor springs hurt my engine?

On a stock engine, 4K springs can accelerate wear. 3K springs are generally safe for stock or mildly built motors. We strongly recommend installing heavy-duty 60lb valve springs if you plan on revving to 3,250 RPM or higher.

What's the best first mod for a 12-valve Cummins?

Governor springs are widely considered the best bang-for-buck first mod — affordable, easy to install, and immediately noticeable in throttle response and power delivery.