Factory valve springs can't handle higher boost and higher rpms. Proven Beehive design means a progressive rate. Fix floating valves and weak exhaust brakes to safely get more power and rpm from your engine.
Set of 6 springs for 1989-1998 12v Cummins 6BT
*This is a set of 6 springsIf you are doing a full set you will need: Set of 12 for a complete set