The Super Turbos where like $80 a piece at Summit. Not sure if this is cheap? :shrug:
If you want to hear what it sounds like, here's a run I did at an autocross. This is from my GoPro mounted in the grill (you can hear the fan come on), and no cats:
I would find a set of oem 05-09 GT mufflers and make them work.. They're large enough to fit 2.5" aftermarket exhaust and will still sound good without the drone.
My car has bbk unequal length shorties, o/r pipe, and stock cat back. Sounds awesome, not super loud, but louder just about right. I've considered getting a nice catback, but it just sounds so good now I'm having a hard timing justifying it...