I have the resonator deleted from my Aero and it sound much better than the stock on the SSB. It is deeper and throatier. Especially as you rev it up and head down the road, or hit it while cruising. It was the first mod I did and I really like it. I didnt notice any power difference, but I would expect any change would be too small to feel. I would not pay a dyno fee just to see the change it might have made. I did it for the sound and flow improvement.

MikeR