Header Question
I am thinking about installing the JBA cat4ward 4-1 header when (or shortly after) I do the exhaust. I will be doing MX-5's second procedure on PTDIY.net. Anyway, question is, will adding a header change the tone of the exhaust? Any louder, any quieter? Im pretty sure that I will be doing the flowmaster force II #17326 single exit exhaust. I just hope that the included resonator will do an an adequate job of cutting the drone on my 5 speed.
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