For Smart 700cc petrol 450 or 452 (Roadster)
The pistons are machined from billet material (machined from solid bar) and made from 2% copper alloy 2618 aluminium. (So as strong as steel).
They are made to have the same compression as the standard pistons, have thicker skirts, are a better quality material and have 17mm pins and are a 67mm (+0.5mm) Diameter.
Avalibility: 5+ Sets in stock
Machined from solid in 2618 aluminium