SKU: 94001023980

Power Driven 3K/4K Governor Springs

Sale price$153.00 Regular price$170.00
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Description

Power Driven 3K/4K Governor SpringsPower Driven 3K 4K Governor Springs 19941998 5. 9L 12v Cummins (P7100) Governor springs are widely considered the best bang for buck first mod on a 12v Cummins. The stock P7100 injection pump is governed to cut fuel well before the engine reaches its potential these springs raise that RPM ceiling, unlocking more power, sharper throttle response, and a noticeably different driving experience. One kit, one afternoon, immediate results. Kit Includes Full

Power Driven 3K/4K Governor Springs — 1994–1998 5.9L 12v Cummins (P7100)

Governor springs are widely considered the best bang-for-buck first mod on a 12v Cummins. The stock P7100 injection pump is governed to cut fuel well before the engine reaches its potential — these springs raise that RPM ceiling, unlocking more power, sharper throttle response, and a noticeably different driving experience. One kit, one afternoon, immediate results.

Kit Includes

  • Full set of 3K/4K governor springs
  • Spring bases (retainers) included

3K or 4K — Which Do You Need?

  • 3K (remove the center spring) — Raises the fuel cutoff to ~3,000 RPM. Safe for stock and mildly built engines. The right choice for most street and tow trucks. Better throttle response and power without pushing the engine beyond its limits.
  • 4K (leave the center spring in) — Raises the fuel cutoff to ~4,000 RPM. More aggressive, best suited for built engines with supporting mods (upgraded valve springs, head studs, turbo). Not recommended for stock motors.

⚠️ We strongly recommend installing heavy-duty 60lb valve springs if you plan on revving to 3,250 RPM or higher. Without them, stock valve springs can float at higher RPM and cause engine damage.

Fits

  • 1994–1998 Dodge Ram 2500 / 3500 5.9L 12v Cummins with P7100 injection pump

*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.

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.

Do I need any special tools?

Basic hand tools and mechanical knowledge are sufficient. Installation is straightforward — watch the install video below. Our optional Governor Spring Adjustment Tool makes the job easier if you plan to do it more than once.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 94001023980

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4.6 ★★★★★
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Nani
Fort Morgan, US
★★★★★ 3
Good but not for my dog
Color: A Red, Size: For Larege Dogs
Dog loves it but already falling apart. Can't seem to find a truly safe dog toy that won't come apart with my aggressive chewer. Had to toss it before pieces got ingested. But great toy in the begining. Just not safe for pit/staff type dog that destroy and chew.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
M
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Mayberry mommy
Los Angeles, US
★★★★★ 5
Put your aggressive Chewer dog to the test!
Color: A Red, Size: For Larege Dogs
A very tough toy to stand up to my aggressive chewer lab! It's a great value! The squeak is not annoying, and she's got to clamp down hard on it. It's a nice throw toy! It bounces once or twice but it still brings out the pup in our Dog! Not too small a nice size for a Lab or retriever
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Reviewed in the United States on June 7, 2026
M
Verified Purchase
Mo
Lexington, US
★★★★★ 5
A Hardy Toy for Chewers
Color: Bule Octopus, Size: For Larege Dogs, Color: Bule Octopus, Size: For Larege Dogs
I must say I was very surprised with the durability of this toy. We've had it for 3 days and not one puncture hole. My rescue is a destroy chewer that doesn't care for Hardy chew toys unless it squeaks. While the squeaker isn't the best, he still loves it. We put peanut butter in the grooves for him and he goes to town. Will purchase again should he ever destroys it, worth the price!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
J
Verified Purchase
Jeffrey Brown
Charlottesville, US
★★★★★ 5
Durable toy for a great price! Will buy again.
Color: A Red, Size: For Larege Dogs, Color: A Red, Size: For Larege Dogs
Great toy, heavy, good size, and durable for active chewers. My two dogs like to play tug a war a lot and this toy has held up fantastically! Afterwards they tend to chew toys to pieces but this one has stood the test of time so far. Great buy!
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Reviewed in the United States on May 14, 2026
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Verified Purchase
SHUGRLTARA
Whiting, US
★★★★★ 4
Very tough & VERY heavy
Color: A Red, Size: For Larege Dogs
My dog is a half black lab/half pittie & a very aggressive chewer she goes through toy bones very quickly, to the point they're so slivered up within 2 days, sometimes slightly longer, I have to get rid of them, they never last long, except for whole antlers and some split antlers. Although she rarely touches the whole antlers . Anyways, this is a great tough toy for strong large breeds. It squeaks in the center if you squeeze hard enough but the toy/bone was a bit too heavy for my girl. I got her the next smaller one and she still plays with the big heavier one more than the one that fits her perfectly so go figure. It's a great product and definitely recommend for heavy chewers. I only took a star off because of the weight I was extremely surprised by how heavy it was, but that's not necessarily a bad thing depending on the dog, this size is just not for my dog. I think I've had it about a month and she does play with it, not as much as her other toys, but it's still in amazing shape even with her heavy chewing.
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Reviewed in the United States on April 21, 2024

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