http://www.gopartstrader.com/cgi-bin/suite/classifieds/classifieds.cgi?request=detail&id=163247&category_id=112&prev_action=today&website=default&session=40548c127dbb1cd9

"I have upgraded my exhaust and have the OEM exhuast. 60,000 miles on exhaust good for GS upgrade $50 plus shipping. Money order only. "

MO only part could be kinda shady, but this is a good budget friendly mod IMO.