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Old 01-22-2003 | 11:10 PM
  #16  
djlyon
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From: Castaic, CA
Default ultra thrust mufflers
Macs. They don't compare. They're no better/worse than a stock muffler (IMEX).

I've never gotten less than a 1000rpm boost out of an ultra thrust and never less than 6 db increase in noise.
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