This kit is for both sides and its function is to seal the taillight housings to the tail light panel. The oval gaskets make a seal around the openings for the individual tail light socket openings and the long strips go around the perimeter. The detail on this kit is poor, if your originals are in good shape we suggest reusing them and not purchasing these.
Replaces Ford part # C9WY-13520-K. *NOTE*
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Dave Movold's work in progress.