Here we have a very rare Ford original fiberglass passenger side quarter extension for a 1969 Mustang Fastback with the Ford part number of C9ZB-6328519-C. This extension is designed the same as the common pot metal version but it is made entirely out of of fiberglass. Factory fit and finish these are very rare and are certainly a nice find for that special buyer. Please keep in mind we do have the driver side as well and they are different from the Coupe or Convertible which should you have need we also have them available so let us know we sell originals.Offered is a damage free piece which has been cleaned and inspected the primed. Ready fr paint you will find it i not a patched up piece and should you need the pot metal or the other side we can help so let us know These extensions commonly have cracks in the area where the studs attach the part to the quarter panel, as they are made from fiberglass. The tab on the bottom behind the bumper is intact 69 Fastback Extensions have the protruding tab on the bottom which is fragile and commonly broken off.These nice piece came to us in great shape with no cracks or structural damage and needed only a light sanding and priming. This extension is ready bolt on to your vehicle and refinish in the color of your choice.This factory part will please most if not all proud Mustang owners seeking the quality fit and sturdiness of a genuine Ford part.