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because race car
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My dad said that if I upgraded the exhaust on my 03 svtf I would have to tune my ecu or it would run wrong. I thought about spending the money on a borla but I can't imagine spending $1,000 on sound. I'm thinking of cutting the last lunchbox and put like a 3 inch tip on it. Would It run different???
 

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The Borla will not show any gains or losses in power on the SVT Focus, so there's no need to retune.
 
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