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).
Complete camshaft (not in exchange!), Which produces more power and torque in the middle to upper speed range. The opening times, the intersection and the valve lift were changed / increased.
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.
Cylinder Head for Honda GX340, GX390:
- Extend and smooth the inlet and outlet channels- Increase compaction
For larger valves, the valve seats must also be expanded (Art No. 3502).