This is a BRAND NEW MGB Caliper, no more having to deal with old rusty cores. Put new Calipers on your MGB and stop with confidence! Please use the pull down menu to choose right or left. Don't forget about new brake hoses or new brake pads to make the job easy and clean. Front Hose GHP501 and brake pad # GDB331 27H4650 27H4651 180-525, 180-515