Detroit Diesel Series 50 T-112512-A Bendix Engine Brake Air Compressor 23516840 with Fuel Transfer Pump 23517845. IN GOOD CONDITION PLEASE SEE PICTURES. MATCH PICTURES AND/OR PART NUMBER IF LISTED TO MAKE SURE THIS IS THE RIGHT PART YOU NEED. ASK US IF YOU HAVE ANY QUESTIONS OR CALL YOUR LOCAL DEALER. WE STRIVE TO KEEP OUR CUSTOMERS SATISFIED.