I have a BMR Rear Tunnel Brace with Safety Loop that will fit 05-14 GT. I received it as a gift, but it won't fit my car, It's brand new and has just has been sitting in the garage for the past year and a half. Asking $100. Here is a link to the safety loop from American Muscle. Let me know if you have any questions
BMR Mustang Rear Tunnel Brace w/ Safety Loop - Black DSL011H (05-14 All)
BMR Mustang Rear Tunnel Brace w/ Safety Loop - Black DSL011H (05-14 All)