Hello I was just wondering what caused my pistons to crack I have an h22a swap in my eg with a fully built head and made 223 on the dyno. Some people said that it made low numbers. Can the tune break pistons or did something else happen? I just need some input because I'm rebuilding my block and I don't want to go through the same thing again thanks in advance.

 

Where did they crack? Are they OEM? Stock sleeves? There are a lot of possibilities.