Awesome idea for a thread.
Question though - if you're spending that much money on pistons, why not spend a bit more and up the compression?
1992 BMW 325i (CHUMPCAR #296 - build in progress)
1992 3.0L M52 325i (ex-daily driver - track car only)
2002 330Ci (ex-daily driver - sold!)
Check out my e36 track car build