Quote:

Andy's Viper caliper kit on stock rotors will fit a 15" wheel.





Not true. They may fit SOME 15" wheels, probably all steel wheels, but not all aluminum/alloy wheels.
I have the kit on my RR, and the 15x8 AR 200S wheels (from the 80s) (3-3/4" BS) rub slightly on the calipers. Not enough to prevent me from moving the car around the garage, but certainly enough to prevent driving it. New wheels/tires (17") are on the list.