HAHAHAHAHAHAHAHAHHHAAAAAAAAA
This guy is funny as hell.. First of all, I don't believe that you have a turbo cavalier, because it would have blown up without a computer upgrade anyway, and you wouldn't have a governer.
4 audiobahns? oooooo wow.. your just like every other ricer in this world, and the fact that they're facing the front doesn't help, rear facing is louder.
And as others have said, I will join them, I'm a relative noob to the technical side of car audio, but performance I do know, and I have been building and helping build cars since I was 10 years old. I still don't believe you, and won't without pics.
and as far as your car, even if you do have it. I have 2 cars right now that will kick the shit out of it. 1 is a mazda rx7 convertible, I've had it up to over 150 and it still had about 2k rpms left till redline.
the other is a 66 ford f250 short wheel base pickup. it may not look great, but its got 460 cubes under the hood, and it is anything but stock on the inside.
come on down and get a peice of a real car any time.