I think I have found the limits of Incon 800 TT Kit. Still on 2.5 inch exhaust. Not bad power for a kit that I paid $2,350.00 shipped back in 1997.
http://204.210.241.52:50001/Dyno%20Graphs%20and%20Pictures./Dyno%20Graphs/1988%20Mustang%20GT%20-331%20-%20DTM%20-%20808%20RWHP%20915%20RWTQ.jpg
Did my first 4th gear rolling burnout tonight. Dyno Brian is very happy