Single low drag high compression genuine Nural piston. These can give a compression of 10.3:1 with the right head, and have an 8cc dish. Oil rings are 3mm and top and secondary rings are 1.5mm. Includes a set of rings. These are a great choice for a lightly modified rebuild. 
 
Availible in STD, +.020, +.040, and +.060.
 
Sold individually.