Quote:
Originally Posted by flzrider
I really don't think there will be any advantage (in terms of sound only) going to N55 midpipes. Dackel recently found that the N54 midpipes are not resonated, whereas the N55 midpipes are. So in all actuality, it may get quieter going to N55 mids.
For a point of reference, I have a stock (N54) mids on my 1M + Akra slip-on with no valve kit (always open) and I think it sounds great. I could probably go even a bit louder.
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One thing to note is that the N55 mids remove two cats.