Complete set of three 70,0 mm Donney forged pistons.
As the recommended piston play is 11-14/100 of a mm these pistons can often be used in standard bore 850 cc engines as the bores must be honed out and then often will be cleared out to.
Donney pistons have the same hight and shape as a standard Saab 2-stroke piston but with two thinner rings that has lower friction and gives more power.