4k governor springs

there's only one spring in those, all i've ever heard of is the 366 spring (3200rpm) puredieselpower.com has them i believe, im sure someone else knows if they go any higher than that
 
They do there are some people on other forums runnin them but dont know who makes them.
 
The 354 (4200rpm) spring is a Bosch Part and is available from any pump shop, but modifications are required to run it in our pumps. You have to cut I think 2 coils out of it, I got one and cut it down but havn't installed it yet, need valve springs first

Bosch PN# 1-464-650-354
 
Make sure you put 60# valve springs in. They like to float valves @ about 3800-4k rpm.
 
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