hey mate, ive got stainless steel 4-1 headers to fit with my JDM DC2R cat and b-pipe with a stock muffler and sounds completely stock in my EM1 and roars when in vtec. Getting a twin loop muffler with that setup would still sound relatively stock until u gun it and vtec kicks in. The b-pipe is 2.25 INCH which is a good setp for your b16.
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