i was racing a pretty much stock neon it only had intake. i thought for sure i could take him with my 6}). i have full catback exhaust, intake, headers, and short shifter. we do a r ling start at 25mph i'm in third and throw it down into second gear i had the lead and all of the sudden he just passed me. my friend said that he double clutched. i agree because he had it in gear and then just switch gears right after we lauched. my ? is what exaclty is double clutching and doesit really make you go that much faster.