This kit allows your engine to have full fueling to approximatey 5000RPM PLUS!, which greatly improves the driving experience of a stock truck, for trucks with injectors and more, this kit is a must! We highly reccomend installing heavy duty 60lb valve springs if you plan on revving your engine to 3250RPM+.
The governor spring kit is designed to allow your pump to rev past factory settings without compromising pump safety.
5000RPM kits require use of heavy duty valve springs. We also highly recommend the use of billet valve retainers & keepers.
We use this kit in our pulling and race pumps and can rev over 6500 RPM with full fuel!!!