Reference: shspeed
Reference: shspeed
Additional inner spring set (set = 2 pieces)
These valve springs are inserted into the original and strengthen them.
These springs are suitable for engines which have been easily machined (e.g., RPM controllers removed).
Reference: 1693A
Reference: 390-ROLLRCKS-13
Reference: 2210
Reference: 1691
Reference: 3536A
Reference: 1682
Reference: 1688