I'm pretty sure this is some gimmick, but has anyone actually used one of these? Never heard of it before, and want to know exactly how it works. Is it worth getting, or just some money grabbing gimmick?
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I have a 2010 Tacoma with the v6 and want to put in bigger headers and cat back. Would I get more hp if I did? Would I only get a better sounding truck? Also, should I get a 3 inch or a 2.5?