No, when I got it, the left spark plug kept backing out on me, so when we got into it to see what the problem was, the guy had replaced the domes, and they werent cut for a 4mil, so that was causing the problem. The piston was tapping the dome, thus backing the plug out. So, the piston had a few markings on it, they didnt have to be replaces, but I figured why not. I ordered the correct cut domes from Kevin (who also did the porting) and went ahead and got some pistons too, might as well.