Bolt on mufflers are they all the same?

I've not got a ZX7R and am looking to replace the stock muffler system with a bolt on but I'm having trouble hunting down some good deals on the internet... I used to have a ZRX1200 '08 model which also had a bolt on to which I fitted a scorpion system and as far as I can see they are both of the same type 3 bolt setup.. Are they the same spacing? I've heard that other models of the kwaka are with the 7R but just not sure which ones because if I can find out it might broaden my scope on possible pipes to buy.