NEW AP AIR DESIGN 6E171 COMPRESSOR WITH LATE DENSO 10PA17 INTERNAL DESIGN. CAN RE-USE ORIGINAL MANIFOLD. FOR MANIFOLD REPLACEMENT KIT, ORDER 451-1173K. CAN USE STANDARD DUTY DENSO STYLE - 503-116 CAN USE HD SANDEN STYLE COMPRESSOR - 503-117 WILL NOT FIT JOHN DEERE MODELS 2250, 2450, 2650, 2650N, 2850, 2355, 2555, 2755, 2855N, 2955, 3050, 3350, 3650, 3055, 3155, 3255 WITH JOHN DEERE AL63652 COMPRESSOR MOUNTING BRACKET.