Wilwood Dynapro Dust-Boot Rear Parking Brake Kits offer disc brake upgrade solutions for people requiring a parking brake. Completely redesigned, the Dust-Boot line of brake kits use a 12.19'' rotor with the express purpose of maintaining the factory wheel position. Based on the venerable forged billet Dynapro Dust-Boot caliper, these kits were developed for applications or locations that require or prefer a dust-booted piston. The dust-booted aluminum pistons provide added protection against road or track born debris on vehicles that may operate in harsh environments. Most applications require no modifications for installation, and provide plenty of clearance inside popular 15" wheels. The neatly hidden internal shoe system provides a clean installation with superior static holding power for parking.