Buick Riviera Front and Rear Disc brake conversion kit with brake booster and master cylinder. If you want a complete kit to convert your Riviera to 4 wheel power disc brakes your search is over. The complete kit offers great stopping power on all 4 wheels thanks to a powerful brake booster and master cylinder. When you receive your kit it will include a copy of a parts list. The rotors, calipers and pads are all going to be available at your local parts store. It just does get any better than this. This kit is to be used with 15 inch or larger wheels.