Mustang Locking Gas Cap 2010-2013 | CJ Pony Parts Gotta Have It Race gets a Locking Gas Cap - CJ Pony Parts Installation for 2010-2013 Mustangs Turn tampering away! Enhance your peace of mind with this precision-fit locking gas cap. Easy on and off at the twist of a key. Includes two matching keys. This is a direct fit accessory part for 2010-2013 Mustangs with the capless fuel filler system. to our YouTube Channel to see more videos!!