excuse me for being so dumb. take that scorpion exhaust for example, i understand the backbox is just the back bit but am i right thinking just backbox dont improve performance?
and then there is the full system tailpipe with the removal of cat converter, is this a good idea given thats its illegal?
when people say they have a full system, is it right to think they have the whole thing from manifold, middle, de-cat and backbox? or is it just the middle to back with de-cat?
quite confused with these abbreviations, please help
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