Roush How much horsepower does a Roush Side Exhaust system take away???

T-Sho

New Member
Jul 31, 2006
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I am about to convert my 2003 GT to the Roush Side Exhaust system with Spin Tech mufflers and I was wondering how much horsepower will this conversion (without adding anything else) cost me? Keep in mind that my car currently is 100% stock.
 
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