I'll be taking off my header pipes this weekend (or next) and putting them up for sale.
They're the stainless steel akrapovic header pipes. Includes springs (so has everything you need). These are compatible with the stock end can (& any other aftermarket can), which is how I've been running it. Makes the bike sound absolutely amazing, really let's it sing. Noticeable extra midrange power and torque too. They will fit all S1000XR bikes, regardless of year. My bike made 158 rear wheel horsepower on the dyno after fitting these.
They've covered about 300 miles on my bike, but fancy a change. Perfect condition
Video here:
https://www.s1000xr.uk/index.php/topic,2192.msg18993.html#msg18993Price: £585 including delivery within the UK, collection possible from Leamington Spa, Warwickshire