This high performance piston has been designed specifically for use with our engine kits.  This piston offers 10:1 compression ratio and comes with quality Riken rings.  Still works with pump gas and is available in stock bore 67mm or our 70mm big bore. 
 
Informational video here: https://youtu.be/7KXsVuO-fNo?si=m4aqqmnQ_BL0zeXu