Cooper S caliper piston 1.75″ size Classic Mini with 7.5 disc brakes. Stainless steel caliper piston for 7.5″front disc brakes as used on Cooper S cars and 1275GT with 10″ wheels. The most popular disc conversion kits use the Cooper S calipers – this is the replacement piston for those kits, as well. Sold each – four (4) required per car. Cross Reference 17H8626, 115-102








