Set = 2 pieces.Reinforced valve springs for Honda GX270 to 390. The original springs are replaced completely.We recommend these springs for engines equipped with large wedge-proof valves and a Tunign Camshaft. No additional inner springs are required.
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).