A lot of the problem is the size of the pipes. 3" tend to resonate more than the 2 3/4". The bottle resonators (if equipped) and the mufflers also play a big part in the cancellation of drone.
I'm closing in on 50 and while I still love the true musclecasr sound of a catback system, I'd prefer to do without the headache resulting from driving for more than 30 minutes in a car that drones at highway speeds.
The Corsa is nice because it's almost inaudible at cruise, but barks like it should under throttle. I also love the backpressure "gurgle" of the system when downshifting.
BTW - I found the Corsa Cat-Back system (14138 - for SRT8's) for $1,169.10 including S&H. I thought that was one h#ll of a good price.
