I'm with Jim - I thought that exhaust that brings tears to your eyes and lingering odors to you clothes (if you run it too long in an enclosed space, even with the garage door open)was part of the appeal of a classic car
But more on the practical side (to add to Doc's comments), you also have to take into account the space issue for 2 cats, as most likely your performance car has dual exhaust.
FGF floorpans were not set up for cat converters.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
