How do you know they are a million times better? have you done back to back runs on a dyno to compare them on the same bike. Where are you getting your comparisons from. I ride at my local Pitt bike track almost every week. My cousin and I both have 2003 xr100's. He bought the FMF because he was a little short on cash and I saved up to get the PC. To do a "back to back" comparison we both rode five laps each on the track on a bike and then switched. The FMF pipe gave the bike the deep tone but made hardly any difference in power as we (neither of us) could clear the 10-15 foot (I'm not exactly sure) double. However, with the PC we were flyin' right over it with no problem. I don't care what a dyno says, it's actually riding the bike and feeling the power at the track that counts. I'm not trying to start a war or get on anyone's bad side here, I'm just conveying my experience so that somebody else doesn't get in the same situation my cousin did.