The standard exhaust had been modified (shortened) by the previous owner of my 2007 XT 600 E and I fancied a SS replacement to give the bike a bit more style. I found a Dominator (oval) exhaust on eBay(UK):

Dominator Exhaust OVAL Stainless YAMAHA XT 600 05- + DB KILLER | eBay

I did a bit of research on Youtube etc which seemed positive, this was advertised as '05 on', I messaged them to confirm, the fit, they confirmed it would fit 100% so I ordered it. After a week I noticed it hadn't been dispatched so chased them up. They responded by asking for the outside diameter of the header and for some photographs of the bike with the original unit removed, I gave them what they wanted including frame # etc. A week later it was dispatched and I received it a further week later. I opened the packaging, both end can and link pipe were wrapped (separately) in bubble wrap which, when carefully removed revealed two dents in the can, on the outside where they would be seen, also there were areas of scratching which was less noticeable but obviously done in the factory. I immediately emailed them with photographs and they offered me a £40 partial refund, they then asked me to fit it and check all was otherwise OK. This I reluctantly did, albeit I didn't want when badly damaged (it's my job to dent it!) it became apparent very quickly that the link pipe wasn't the right shape causing the end can to sit where it would contact the rear tyre, not even parallel to the frame. I took photo's and emailed Dominator, who asked if I wanted a replacement, on the grounds that it too, probably wouldn't fit and/or arrive damaged I declined. I packaged it up in the original packaging (taking photo's as I went - just in case) and sent it back to Poland using their UPS account. A week or so later I was credited with the original price and packaging.

To summarise, hopefully in an objective way. I was disappointed with the packaging allowing the end can to be dented also no 'Fragile' marking etc. the build quality was good apart from the scratching which showed lack of attention to detail. Why it didn't fit, I really don't know, they had all the information possible. If there is a 'plus side', the company always responded rapidly to my communications and thanked me for my photographs, they refunded my money the day they received the returned item. Unfortunately they are still advertising this unit on eBay so BEWARE!

I'm not sure if my 'late model' (2007) bike is radically different to older models, I wouldn't have thought so, maybe you know different!) I'll keep looking for a suitable replacement unit over here in Portugal.

Update:

It's now about a month after I received my refund from Dominator, I mentioned above that Dominator let me return the item at no cost using their UPS account. Yesterday I got a bill from UPS for 182.00 € because Dominator have refused to pay the bill, seems strange as the original price for post and packaging was about £ 25.00. Looks like I've got another battle on my hands now, fortunately I hadn't deleted all the emails between me and Dominator and I've found the one saying to return it at no charge using their UPS account. Personally I'd advise against dealing with Dominator.