Wilwood Engineering Disk Brake Kit. This Wilwood big brake kit is designed for 55-57 Chevy Belair's and features the large 12.19" drilled and slotted rotors and black forged billet Dynalite calipers. This kit comes with everything you need including billet hubs, mounting brackets, seals, bearings and Wilwood high performance Smartpads. Kit works with most 15" wheels. Wilwood brakes are the perfect choice for your project whether it is a show car, race car or daily driver. Other options are available such as red or polished calipers and solid rotors.