![Head processing complete Head processing complete](https://www.beneduracing.com/2080-large_default/head-processing-complete-gx340-390-benedu-racing-for-all-your-kart-parts.jpg)
Reference: shspeed
Reference: shspeed
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).
Reference: 1691A
Reference: 3502
Reference: 1694
Reference: 390-ROLLRCKS-13
Reference: 1688
Reference: 1682
Reference: 1693A