Marthy, it's all good in US where rules allow you to do so, and there's is low sales tax.
Should we Britons - or Scandinavians - buy from you, we first of all have to pay an import tax and VAT.
For your system, you will need to add the shipping cost and additional $250.
For Scandinavia, eg Denmark, this would be $300, excl shipping, and handling fees.
When you then have received your exhaust, it needs to be marked as road legal, or your insurer might say your bike is tuned and not be covering you when needed.
Suddenly, it's not so convenient to get a "good offer" on an exhaust from US. It might sound good, it might give you 2bhp more, it might save 2 kg on weight as well.
But it will never save your hassle and troubles.
For that reason, I'd only buy road legal, approved to use en EU.
For that, Yamaha have made a very impressive system with Akraprovic.
But for its price, you can so many other things, for example a cock extension
- or maybe an unforgettable holiday.
Anyway, that's just my view on it
