Gary, I have heard the BTG, but have not heard the Air raid unit. I have an AMX1397 3" turbo up intake. The BTG is not as loud as the 1397 intake, in fact it is quite a bit quieter. I am running the Scottsdale dual exhaust with a glasspak that is tuned for the cruiser. Its pretty loud, and has a nice deep sound. The BTG IMHO will not adversley effect the sound of the exhaust system. In fact I think it enhances the overall sound of the car (weather it sounds too loud or not is your call) I'll send you an E-Mail shortly.
Alan [}
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