- Bore=3.498in. – Stroke=3.812
* Hypereutectic Alloy is a cast 16% silicon content material
* Perfect for air cooled engines
* Low thermal expansion rate = tighter piston-to-cylinder clearance
* Hypereutectic Alloy is a cast 16% silicon content material
* Perfect for air cooled engines
* Low thermal expansion rate = tighter piston-to-cylinder clearance