Air Spring Bag For Expedition 97-02 Navigator 98-02 2WD F75Z5A891AC 3U2Z5580KA Suitable for Expedition 2WD rear models from 1997 to 2002 and Navigator 2WD rear models from 1998 to 2002.Replaces OE numbers 3U2Z5580KA and F75Z5A891AC.This air suspension bag is designed as a direct fit replacement for the rear air springs.Each order includes , suitable for either rear left or right side.Constructed to match specifications for consistent ride comfort and suspension performance.Intended for use with compatible OE air lines.This is an aftermarket component engineered for and proper function in compatible vehicles.