LASER exhaust fitted. Typical cheap aftermarket exhaust. Doesn't fit very well so you have to take your time and mess and fiddle and bodge but you can get there in the end. I wanted to get it fitted and not leaking anywhere so I could ride it and see what it is like, hence the Holts Gun Gum bandage on the front headers. These leaked like a sieve and rattled when I first tried it.
It now sounds OK and is not too obnoxiously loud which is good. Like most have commented before, there is a hole in the power band at around 5K but you only really notice this in high gear. At low speeds it is fine. Quite happy with it really. When I have it fully sorted I'll probably remove the centre stand as you loose the bump stop on the left silencer. I have bodged a fix for now but the centre stand is very easy to put on and take off so I'll take the weight reduction..
Performance definitely takes a hit. Lost about 15km/h off top speed, but early days and top speed is irrelevant for what I am going to use it for.