hi guys,,,need some help here...im in process of installing the endyn rollerwave pistons made for the zc motor on my car...the website list the zc as a 75.5 mm bore and the piston are to wide..i think the zc is 75mm bore....does anyone know which is true?? thanks

 

stock bore size on the ZC is 75mm - i would guess that Endyn is assuming that you would bore the cylinders and only offers pistons for engines that have been bored 0.5mm oversize, making it 75.5mm

 

Yep, .5 mm overbore is the most you wanna go and usually what you would bore it to. 75mm is stock bore.