Quote:
Originally Posted by dd1981
Also, knowing what I know now, and having modded my 2nd F30 and with how far JB4 has come with can flap and opening and closing the valve when I want now via JB4 with the added down Pipe as well I probably would leave the muffler alone as is.
With a down pipe and OEM muffler with valve open 100% the car really sounds amazing, I cant stress that enough. If you dont plan a down pipe I would probably do the mod.
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Loudness is subjective sometimes. I run a bypass once the 2nd flap opens as well as a catless downpipe. Otherwise it still retains the stock rear muffler and rest of the exhaust. Although it's a bit louder and the overrun is more exaggerated, I still think around town it's kinda quiet. I think the next step is to just remove the muffler altogether, but I'm afraid of drone.