My car is supercharged and I'm just running cat deletes. I'm sure that long tubes would help me, but I'm not sure if it's worth the money. Most increases you see are from going stock to longtubes, not cat delete or offroad H/X to longtube. I'm thinking I might see another 20rwhp and am not sure it's worth it for that little.
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2012 GT/CS KB2.8LC 596/487
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