Pacbrake Governor Spring Kit
Pacbrake offers a wide variety of spring kits for all applications of 6BT & 4BT Cummins engines. Whether you are installing an exhaust brake or governor spring kits we have the kit for you. Heavy duty valve springs are Cummins OEM 3916691 white strip springs. The 60lbs spring is required for exhaust brake applications and is suggested for all governor spring installs. Governor spring kits allow the Bosch P7100 to spin the engine RPM up to 4000 RPM. Each kit comes complete with parts for either 3000 or 4000 RPM.
Pacbrake’s governor spring kits are recommended for vehicles that have 5 speed standard transmissions. They are perfect for those who tow heavy loads and want more responsive power.
THIS KIT CONTAINS 6 GOVERNOR SPRINGS.
PLEASE NOTE: THIS KIT IS NOT LEGAL FOR SALE OR USE IN CALIFORNIA. This kit may not meet emission standards for your area. Check your local regulations prior to installing.
Reviewed on XDP.com
I only installed the 3k springs per the directions… TAKE THE MEASUREMENTS it takes the stress out of having any complications… after it was installed I have more boost more power and throttle response… if you use the 4k small spring upgrade your valve springs… when installing this kit you can use a 3×5 note card around the springs to keep you from losing any thing in your pump…. I HIGHLY RECOMMEND THIS KIT
Reviewed on Thoroughbreddiesel.com
A must have for 5 or 6 speed manual transmissions.
Reviewed on Dieselpowerproducts.com
Best bang for your buck. Great product. Came nicely packaged with good, easy to follow instructions. Made a huge difference in waking up my truck. Could hardly get out of its own way before and now it has no problem passing almost anyone.
Reviewed on XDP.com
very cool that it comes with the 3k or 4k option (using 3 or 4 springs changes it) and wow best investment ever. Really woke the top end up but on a stock turbo I don’t recommend these without an egt gauge because you can really do some damage at the temperatures you can reach after the install
Reviewed on Dieselpowerproducts.com
Gives a ton of low end power. By far the cheapest horsepower upgrade to the 12 valve Cummins! A must for anyone with a manual tranny.