So , I finally got my gthaus musa GTC cat back exhaust fitted and wow does it sound great and the car certainly feels different to drive.
The reason for popping it on the dyno before having the exhaust fitted was because gthaus say that fitting this cat back system can give you more bhp. After putting it on the dyno with it installed and everything else the same I.E 5th gear and 7000 rpm it certainly produced more bhp , I then opened the valves and the final run produced 49 bhp extra.
Here are the results which I know to some of you will mean more than it does to me.