Quote:
Originally Posted by niky
Some smaller cars around these parts only use a resonator, as the cats already remove most of the sound and you're not getting a lot of noise out of a sub-liter breathing through a paper straw, anyway.
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a thought: run a secondary CAT (the kind without sensors) that was designed for a similar engine size/output, such as a Civic hybrid in my case, instead of a resonator and muffler. There would be a muffling benefit and potentially better emissions. An aftermarket one need not be super expensive ($100-$200). Getting rid of the muffler would help compensate for added restriction from added catalyst.