Lots of variables...much has to do with how much boost. I was running 12lb with a P1SC and blew the rings in two cylinders. Was always told that was OK with intercooler and proper tune, but I still managed to kill my motor. A guy at a local race shop here strongly advised against running that high of boost without building up the block first. On the other hand I've heard of guys running 12 and over on stock block and were OK. All I know is that the warranty on the 03 I have on order looks pretty attractive after that mess.