If you're viewing this item, chances are you're like the countless other people we run into who have a cracked, leaking, or otherwise bad catalytic converter on their vehicle. Pacesetter has your solution with this bolt on direct replacement catalytic converter. Simply unbolt and remove your bad converter and attached piping, and reinstall the new Pacesetter converter and attached piping. You'll be back on the road running as good as new in no time. The part number for this item is 324138 and it fits 2005-2007 Chevy Cobalt, Saturn Ion, 2006-2007 Chevy HHR (2.2 and 2.4 Models).