The Predator dosn’t look to bad, give me a shout when and if you do want to get rid of it.
I tried one of the front underslung pipes off my race 350K4 and it seemed to fit quite well, I will try the other side at a later date and if it fits I can always buy another pair £90. http://www.swarbrick-racing.co.uk/
I do have a welder and have made many silencers in the past, I keep intending to have a go at “Hydroforming” but as yet not got around to it.(Hmmm thinking now might be the time)