The stuff shown in the first photo is a standard system
The second one looks kosher.
The 3rd one sounds like an assymetric system.
Beware , the race ECU is different for each different model of 749 and 999 , also , if the race supplied ECU has been fitted to a bike (even if only for 600 miles as stated in the 3rd ad , it wouldn't matter if it was 6 miles or 6000 miles) that ECU will not work now on any other bike other than the first one it was fitted to (Ducati Uk know about this problem) , you will have to either buy a replacement ECU (£450 ish) or run the system with the standard ECU , you then get the noise but possibly not the full BHP gains that you might get by running the pipe with the correct race ECU
