POL -13″ Black OutTrack 4 disc brake conversion by Baer takes your braking performance to the next level. Works with 1965-69 Mustang with stock OE drum brake spindles.Billet alluminum hubs come packed with Redline synthetic grease and include billet dust caps. The POL Branded Baer 4 piston T4 calipers include D.O.T. compliant dust and weather seals.