2003 Grand Marquis
I just picked up a 2003 Grand Marquis with 52,000 miles on her. A couple years back I had a 2007 P71. As expected, the GM is no where near as snappy. I would like to do some performance upgrades, and most likely start with a true dual exhaust. Does anyone have any suggestions, or know of good websites where I can shop for performance parts for these cars? Thank you all in advance!