i might have a crack at making one, i can get any bore and any thickness pipe i need so will go for a good thick one.
what do you rekon would be the best way to join the 4 into 2 then the 2 into one???
my dad can get hold of stainless pipes and has a bending machine, do you think making one up would be possible?
what exactly would i have to hange from the old one for better performance?
and what is the difference between 4 to 1 and a 4-2-1??