3 horses? That's it? Seems to get anything else out of it one will need to delete the front cats off the manifold where this system bolts up to. The difference between the touring and track editions is that the track edition is louder but re-uses the stock downpipes while the touring edition comes with downpipes. These systems are clearly is going to be mainly for sound and not for performance. This car simply is just about maxed as even with ECU tune software there is not much to gain.
If one is serious about performance upgrades they will simply have to wait for a supercharger. That, or just go with an S5 that has the 3.0 TFSI supercharged V6 with a bunch of power waiting to be uncorked. This RS5 is not going to be a bolt on monster.
Pictures and dyno graph below. Track and Touring systems retail for $2095 and $2795 respectively.