I purchased these slip-on exhausts from Motoworks Chicago in September 2014 for my 2008 Bonneville. I used them for less than a year and then began my engine rebuild project during the winter of 2014. I am going to install a 2 into 1 stainless steel exhaust system with the rebuild, so I do not these anymore.
These mufflers are available only from British Customs or their dealers for $780.00 plus shipping… see: http://www.british-customs.com/british-customs-triumph-bonneville-t100-sleeper-silencers.html
I like that they look more like the OEM classic style mufflers, but produce a much deeper, throaty roar, a little lower in pitch than the BC Predators or SBT Dominators which I had on this bike previously. I used mine with heat wrapped stock headers – as shown. These are high quality stainless steel exhausts that will last for many years. You may need to retune your engine to allow for the extra air flow and added horse power these will produce.
Sale Price = $500, plus shipping within the US.