I always think it is interesting seeing how many different engine builders using different style of pistons. I figure they are all about the same give or take... I went with the Probe Pistons 18.1 CC Dish I believe and Bored Out 30... They say Probe is the quietest and I see a lot of builders use them... Are main stud girdles worth it??? I am looking to go turbo and produce big numbers! I would like to hear peoples opinions and if they heard any bad things about Probe... Thanks!