This is the Polini Corsa cylinder kit. It is the improved version of the Polini Sport.
The set includes:
- Corsa cylinder in cast iron diam.47mm with 5 transfers and single “oval” exhaust port
-Piston bi-segment axis of 10mm
-High compression aluminum cylinder head
-Kit of seals necessary for assembly
-Pair of carbon valve slats (thickness 0.30mm)