Soundfile or Video with Akrapovic + sportcat downpipes

[RaVe]

Has anyone a video for me to hear, as it sounds, if one has an akrapovic exhaust system and sport downpipes with cat installed.

I would like to have a performance increase, but stage 2 with 750 hp is only possible with downpipes.

I like the current deep sound of my akrapovic system and I do not want this to change against maybe to a horrible loud noise.