There's a company ( zlockracing.com ) that has 82 & 83 mm pistons for $150.00. Is anyone familiar with them? I've emailed them twice, no response (yep, I know, not a good sign). They claim "lightweight, forged new technology slipper design". I'm curious as to what brand of pistons they are.....and is that a good price? Also, how many CC would 82 & 83 mm yield?