It wasnt pretty , i used the oem collector and folded the left side outlet and welded it. As for performance no change in comparison to the duel TOR's , the bike at that stage was having issues with vacum leak due to a split throttle body to head boot.
Didnt sound any different than the twin TOR either , it was on for a week then
@ozrider flick passed me a nice little hotdog type pipe thats still on her