So you "hear" from this anonymous "builder" that those pistons are shit, and your going to say you don't like them with out having any expierence on them?

Interesting.

-- Edit: Also, if this wasn't already known. Pistons don't exactly CAUSE detonation. It's the lack of fuel, too much heat, or lower octane then required for your static compression ratio.

Saying the pistons cause detonation is ambiguous.

If he bought 13:1 pistons. He better be running race gas in that motor. He also better have super access to a dyno, and Hondata.