New to the mustangs and just added a Brenspeed custom tune and C&L street cai to my 07 GT. Wow! What a difference, it runs like a totally different car! I'm very pleased with the results, the 93 tune is awesome. Brenspeed customer service was great also, answered all my newbie questions.
Just turned 12K on the ride, it's loaded and even funner to drive with the tune and cai!

 

Awesome. Did you have the car dyno'ed before and after?

 

No I got the SC tuner from Brenspeed with the 3 tunes. I'm really impressed with the difference, she just wants to throw you back in the seat and burn the tires off!