With most of the 11 inch rotor kits' you CAN use 14 inch factory wheels BUT they have to be the models of wheel that were made for cars that came from the factory with disk brakes.
Since some 14 inch wheels will not work (the ones off of 4 drum brake cars) the aftermarket companys cover themselves by specifying 15 inch wheels.
I got both my front disk conversion and HD 11 inch rear drum kit from Master Power (MP) Brakes and highly recommend them. But I am using 15 inch Rally 2's.
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
