I haven't seen any documentation anywhere stating current exhaust measurements for the N55. I see people mentioning their DP goes down to 2.5", they have the AR 4", etc. What size is the inlet to the midpipes, and the outlet from the midpipes into the catback?
I come from a subaru where 3" all the way was sufficient. I also haven't really seen any midpipe replacements for the N55. I saw some guy mentioning he had the Berk catted mids on his N55, but I don't even see them for sale on their website unless its the N54 system?
Thanks,
Morgan