Hey man I was wondering with my custom Exhaust setup I got its 2.5in but no straight pipe its bent and routed just like the stock exhaust that was on the car originally, So you're saying backpreasure is worthless if you're trying to make HP, But tourqe is also sacraficed becasue with my set up I have very little tourqe like I used to when I had the stock exhaust on my car.
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