I have a 2000 malibu. I'm looking for a replacement system from the cat back or possibly the complete system. if anyone has replaced it or know of any suppliers, please let me know. Thanks!

Do you mean performance, or just a replacement. Check with www.rockauto.com (http://www.rockauto.com). They are reliable and a good place to deal with. You could check trademotion (I don't know the exact site name for chevy.)

Another place I don't really recommend but I have used them is www.carpartswholesale.com They will be able to get you a OEM replacement exhaust.