I am not sure what make the can is but it is basically a hollow reverse cone mega. It was on my bike when I bought it so I do not know if it requires a remap but when I tried the original end cans back on the bike it ran just the same as with the shortie. It bolts straight on, saves a ton of weight and the rear wheel can be removed with it in place. £60 collected North Shropshire or £10 postage.
This end can is now for sale for £60 posted to mainland UK. I have had 2 false starts on selling this so if you live in the back of beyond or cannot complete the sale by bank transfer please make it clear at the outset. NO PAYPAL.