Well im looking for the following:
either rksport or rsm light weight pulley for the ecotec
magnaflow catylic converter
borla muffler any style
ecotec valve cover

Adios cavalier.
I have a catco hi flow cat in my garage, every once in a while I would get a P0420 which is low cat efficiancy....you pay shipping its yours...I make no gaurentee you wont have the same issue with a P0420 popping up...BTW the cat is only about a year old