i think it's the clip for the parachute.. with the "extra sparky" option.

 

Its where he hit the brakes real hard at the end and part of the exhaust hit the track.

 

very impressive time...car is definitely haulin the mail... Id just like to see that put down without the training wheels. Ive got a buddy down here that is roughly in the same HP range with his mustang, stock susp. and puts down avg mid 5.4 1/8 @135 (8.30's range 1/4) 60' 1.24 without wheelie bars. Id love to see a f-body do that just to shut up the mustang boys.

nice vid btw fran...

 

The car sits real low, so when he shuts down and gets on the brakes, some of the pipes scrape