When I first came to the forum, I had built a CR750 lookalike for a friend.
It had 4 into 4 open pipes but we eventually fell foul of the noise restrictions as they were imposed at a few of our tracks.
I built a 4 into 1 system. I used an MTC silencer coupled to the
4 into 1 down pipes.
The down pipes were an American after market product but the make of them eludes me, can anyone take a guess at the make.
They were quite common but I can't remember.
Sam.