This Baer Classic system features a single piston floating caliper mounted to an 11.65" 1-piece slot, drill, zinc plated rotor. The Classic system includes calipers, rotors, brackets, hardware, stainless braided brake hoses and fittings. The Classic Series is the most cost effective, full feature drum to disc conversions available. The 11.65" Classic system fits some 15" and most 16" or larger wheels. Fits GM 10/12 Bolt (BIH/BOA) Fullsize/Big Car Rear Ends (Non-Staggered Shock Applicatons)