its the delkevic, for a gsxr 750. mates up perfect to our stock headpipe. Jim in Texas helped me, the 4/1 mod it was his original idea. He now does what he calls an ontario system now, priced right also. Steve from shoodaben engineering gave me the part no from Delkevic, I believe it was like 189.00 I then took it to my exhaust guy here in Dallas Ga. he took the original delkevic collector and actually sectioned it so it mated up perfect with the can. I have it positioned so it still clears the bags when they are on no problem. that is the original passenger peg mount, I cut off the peg braket and kept on sanding until turnned out to be this. I also had my headpipe ceramic coated to keep the heat down. thx for the response Regards Steve