i used to use a tinted one as then i could flip it up in tunnels - a clear one with sunglasses sometimes left me a little blind in the dark tunnels
there's no issue with dark visors etc over here - not like in the UK!! egads!
Boxman - without a can - a BMW boxer engine sounds VERY sweet
For a while i had a Y pipe instead of the cat and a Titanium straight through exhaust - had to put the baffle in as on wind down it spat 1m flames out the back!!!
but the boxer engine with the y-pipe and a sports can - oh soooo sweet!! smoother, more power, fatter sound.... was lovely!
but alas - didn't want to risk losing my license for it.... which they can do when you ditch the cat and stuff
still got the y-pipe, EFI sports chip and pipe if you're interested though