i need to get a diffrent piston for my 440 my old one has to much compression. I found a white bros piston with 88.5 bore is that the same size bore as the wiesco piston with 12:5:1 comp
GPracer2500
04-30-2006, 06:12 PM
88.5mm is 430cc. Most "440" pistons are 89mm which is actually 435cc.