i dont really kno 12As that good but my rx7 backfires like a mother everytime i shift to second gear. does anyone know why thank you

what u complainin bout? lol that shit is funny as hell..

uuuuh ... put the STOCK exhaust back on maybe ? i know my buddy's turbo II belches fire when you give it hell with just a downpipe on it. otherwise i'm not sure, i think it has something to do with an overage of fuel going down the pipe and igniting causing the loud BANG.... esp with some revv's on it

dont shift above 3k?