Rebuild Kit Caliper Harrop / HSV FrontProduct Code: 05A 970717 If you are rebuilding or servicing your HSV or Harrop calipers then this is the kit you need. This rebuild kit is for the front calipers fitted to HSV vehicles with our calipers, or vehicles fitted with our "Street Performer" brake kit. Vehicle Applications: HSV Commodore VT VZ (Early) Kit Includes: 2 x Dust Boot 55 CAL DUSTBOOT S12 2 x Dust Boot 55 CAL DUSTBOOT S13 2 x Piston Seal 55 SEAL 1. 5 I D 2 x Piston Seal 55 SEAL 1.