Originally Posted by gladiator
I have an '08 690 and am interested in this hi compression piston of yours. The '08 (654cc)has a 102 mm bore, i'm not sure if the newer 690's(690cc) have the same bore? What size is this piston of yours? Will I have to bore my barrel and re-plate?
All 690 & 654cc motors have same bore & cyl head detail.Our hi-comp Cosworth pistons will work with either engine, no boring or re-plating required.