Genuine Detroit Diesel Reliabilt reman Series 50 EGR Head Assembly. Part # R23529994 (factory sticker reads “EGR HEAD ASSEMBLY”) casting # 23511352. Loaded with valves, springs, retainers, keepers, and rocker shaft brackets. Crated in original Detroit Diesel packaging – never installed, excellent condition. Please cross-reference the part number and carefully review all photos before purchasing. Happy to provide additional photos or answer questions – usually same-day response!