I have some numbers on the AP system.

Stock vs. Exhaust system.
Rough numbers as this is without a tune. And Stock airbox.
Exhaust system parts used. AP catback, AP mid/cross-pipe, AP header. (No Tune/ Stock ECU ROM) 91 Gas.
[ame="http://www.youtube.com/watch?v=A63O9TzYroA"]Frs system - YouTube[/ame]
Here are a few more details

Top of the car

Peek at the header looking down from top of motor.

Bottom of car!

Back of car

Side view
Link to the sale:
http://www.ft86club.com/forums/showthread.php?t=11928