4000 Governor Spring Kit for 1994-98 12v P7100 inj pumps or 4BT P7100 Injection Pumps.

Not a cheap ass kit like a lot of others are selling & customer has issues with idle etc.

4000gsk = 1994-95 Inj pumps will rev to a min 3800rpm’s before defueling under load or more depending on how tight you set the retainer nut.

We highly suggest installing HD valve springs on intake and exhaust valves if using the 4000gsk or 5000gsk.