I'm about to do some exhaust work to my car. Would it be better to do everything at once (i.e. header, h-pipe, cat-back), or do one thing at a time? If I were to start with a cat-back, would doing an h-pipe and headers down the road be harder, or more expensive? I'm going to have a shop put this stuff on. So basically, would it be cheaper and less of a hassle to do it all at once, or just spread it out? Thanks
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