Just bought an 03 v6 covertible with 100000 mi.new to having a nice ride..also have a bike for summer drives...but need some info and help please...just picked up a set of 05 oem bullitt rims with 45 mm ofset.17x8..stock 16x8 have 35mm ofset? What size spacer should be used if any to bring rims back to stock stance..??....(2). Recommendations for cat back dual exhausts....way too many options..thank you for any replies...