B bectondavis Member Jul 22, 2003 #1 What is the max you can bore a 94-up LS B18B1? Same Question about the GSR?
phunky.buddha Mad scientist Moderator VIP Jul 22, 2003 #4 82mm is as far as I would go... 81.5mm is the largest OEM piston you can buy.
J JDMilan Senior Member Jul 23, 2003 #5 you can buy custom JE pistons but they take a while to ship in. Milan