i bought an exhaust off of ebay, was supposed to be t5's. i got them and the silencers are toomeys, but the best i can tell(just by shape and design) the header pipes are cpi's. they didnt fit just right and i had to make brackets for the rear hangers. there is a noticable difference in power over stock. should i look for toomey header pipes, or cpi silencers, or will they be ok together and not rob me of any power.