I did briefly look for used, but once I saw what people were looking to get for used setups it just didn't make much sense. Yes I did the install myself, this was child's play. Very easy to install.
I bought it from my local BMW dealer who has very aggressive pricing on BMW Accessory type parts.
I'm happy with the tone and volume level of the exhaust, although I have noticed some harmonics in the cabin at low RPM when you're tipping into the throttle lightly. Around 1500RPM or so in 6/7/8 at higher speeds it can resonate the cabin a little. Its not really noticeable if you have the radio playing, but otherwise its definitely there.
I wonder if a rubber weight attachment on one or both of the cans would attenuate the undesirable harmonics a little. This is a very common item to see on late model BMW's of all kinds, and there was a small one on just one of the stock muffler cans which was effectively deleted.
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