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Has any one made any exhaust changes that have improved mid range and top end power. Mid America has a few systems. The Borla T-304 Race system looks interesting. Most likely very loud. It would be worth it if it gets the 10% horsepower gain that they say.
 

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While I haven't changed mine I can tell you you won't get 10% from a cat back system.

I think 10 hp is about the max you'll get out of one of these systems. IMO, not worth the $1000 or so unless you want an exhaust note change.

Good luck
 
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