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Originally Posted by 1sickpuppy
I asked the shop where I had my headers and exhaust done at about the power difference between a high flow cat and a mid pipe, and if it was worth purchasing. He said I won't notice the difference between the two and that most new cars are already equipped with high flow cats, and that my mag had one. Any truth about any of this?
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I noticed that you said you had your headers done. Wwhat did you do to them?