by putting a aftermarket uppipe in, does that cause any problems with emissions/CAT light? and i've seen 1 uppipe that is $50 less than all others on the market, they say this is because its not chromed, their reasoning is no one sees it so why spend the money to make it look nice. its called the TURBO XS cat-less uppipe and can be seen at
http://home.att.net/~teaguesauto/exhaustw.htm