Part Number: 1555010-87 (Adapter assy) Part Number: 1555010-90 (Riser) Part Number: 1555010-92 (Riser assy crossover) Part Number: 1555010-94 (Tube assy riser) Part Number: 1555010-96 (Riser) Part Number: 1555010-98 (Riser assy cyl#1 front eng c-t33) Part Number: 1555010-99 (Stack lh) Part Number: 155501-1 (Arm&sha) Part Number: 1555011-10 (Collector assy, rh/aft c-337/t33) Part Number: 1555011-12 (Socket) Part Number: 1555011-13 (Socket elbow assy) Part Number: 155-501-1611 (Ne) Part Number: 15-550118 (Toroid) Part Number: 1555011-9 (Collector assy)