STAGE 3 RACE HEAD
Compatible with engine: ZS155, GPX, YX, 1P60FMJ, 1P60FMK, etc.

Our "Stage 3 Race" head is a muscolarized version of classic ZS155 or YX chinese cylinder heads. This upgrade gives to your engine more power, torque and rpm.

OPTIMIZATION LIST
- Inlet and exhaust full gasflowing tuning
- CNC Head Cylinder basement leveling
- Combustion chamber geometry optimization
- re-alignment between valve guides and valve seats
- Valve seats and valve sealings optimization
- Lightweight and gasflowed valves
- Made in Italy single hard springs valve

N.B. HC 53mm dome head, camshaft not included.