Help.....cobra exhaust woes

Please give me some advice. I have a 97 Cobra with an O/R X-pipe. I installed a set of Mac Pro-dumps on it today and it sounds terrible. Its okay when you are idling or normal driving through the gears, but when you accelerate hard, grear down , or let off, it sounds like the guts in the mufflers are loose. It makes the worst raspy, rattling sound that I have ever heard. Like the previous poster said, it sounds like a can of rocks. It is just un-driveable. Will exhaust pipes help this problem or am I wasting my time with this setup. I want something louder than stock without the rattling, paper tearing sound. Any advice would be greatly appreciated. What sounds best with an O/R X-pipe.

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Exhaust woes

Sounds too familiar. I also have a BBK O/R X-Pipe with the pro dumps. You are right, it has the worst rattling sound known to man. If I switch to an H-pipe, will it have that rattling sound when you let off the gas. Maybe I should get a Basanni or Magnaflow catback system for my x-pipe. I have listened to many sound files for the x-pipe and catbacks, its hard to get the sound that I want (kind of loud without that raspy, rattling sound). Oh yeah, these pro-dumps killed my bottom end torque.