Part Type: Engine Coolant Pipe O-Ring. 1999 Ford F-250 Super Duty Engine: 5.4L V8; Molded Rubber; Back Side Of Water Pump; Water By-Pass O-Ring Set;. 1999 Ford F-250 Super Duty Engine: 6.8L V10; Molded Rubber; Back Side Of Water Pump; Water By-Pass O-Ring Set;.
