As I'm sure many of you already know, when designing the 2.0i Z4 BMW went with the batsh*t mental idea of adding an awkwardly proportioned oval exhaust (two pipes into one oval). My current solution is ok, just a fairly large oval tip I found on Amazon:

Meh. It does a job, but I ain't half jealous of the rest of you with your twins and your quads! So bar getting someone to saw off the oval and weld two new pipes to the remaining stumps, I have never seen an exhaust tip with an oval inlet and a twin outlet. But I might just have come close. I've just ordered this (scroll down for pics):
http://www.ebay.co.uk/itm/230836318741
No doubt it needs cutting down, but at least it will accept the 2.0i oval, and it gives a twin effect of sorts. It may be my cheapskate solution until I can save up enough for a proper quad system. I'll let you know my thoughts when it arrives.

Meh. It does a job, but I ain't half jealous of the rest of you with your twins and your quads! So bar getting someone to saw off the oval and weld two new pipes to the remaining stumps, I have never seen an exhaust tip with an oval inlet and a twin outlet. But I might just have come close. I've just ordered this (scroll down for pics):
http://www.ebay.co.uk/itm/230836318741
No doubt it needs cutting down, but at least it will accept the 2.0i oval, and it gives a twin effect of sorts. It may be my cheapskate solution until I can save up enough for a proper quad system. I'll let you know my thoughts when it arrives.