It's not a typical caliper, the Drag Pak calipers are unique from any other Challenger trim bundle. So that you can swap for 15" rims the calipers and rotors really have to also be swapped. I haven't given up just yet, but are going to be pricing it all out. https://alexisvhqyf.ja-blog.com/19974301/the-fact-about-22-fits-dodge-challenger-charger-that-no-one-is-suggesting