So, a few months back I purchased a near new N55 135i rear muffler in Melbourne and finally organised shipping to Sydney last week (it was chilling at my mate's place for a while...). Cost $100, courier through my in-laws cost $32 and I've just had it installed at Lambros Hi-Tec (not the cheapest but they're very convenient for me at work and do a good job).
Apologies for the crummy iPhone pics but you get the gist. Will try get some video soon. First impressions - not much different at idle or cruising around but really sings up high and there are some big pops & bangs on the overrun, which is really want I was looking for! Can't wait to drive it home tonight after work.
Untitled by
autofocus .net.au, on Flickr
Untitled by
autofocus .net.au, on Flickr