ELIMINATES HARD STARTS: Prevents air intrusion into the fuel system, solving the common "start then stall" issue caused by leaky return lines in classic IDI engines.
DIRECT OEM REPLACEMENT: Engineered for a 100% factory fit on 1988–1994 Ford and Navistar 7.3L IDI diesel platforms; replaces part numbers 73120 and MCB73120.
UPGRADED VITON SEALS: Includes high-temperature Viton O-rings and copper washers that resist modern ultra-low sulfur diesel and biodiesel for long-lasting, leak-free performance.
VERSATILE FITMENT: Compatible with F-250, F-350, and E-Series Econoline vans equipped with the naturally aspirated or factory turbo 7.3L IDI V8 engine.
COMPLETE INSTALLATION KIT: Features 7 feet of cloth-braided return hose, 18 spring clamps, 8 injector caps (4 straight, 4 elbow), and 16 O-rings for a total system overhaul.