well i asked the owner, and he said he has no idea what it is either, he had it built and put together, then he took it to tune at 15 psi. Afterwards he ran it at the tracks, he then pulled it out and part out his motor, he then noticed that the cylinders and pistons looked like that. So he has no idea what could've done it. I dont think he had a clearance problem but the pistons do look pretty bad.