Just bought a twin stack MHP system from abrmoto (thanks Aly, it polished up great!).
I need to get the collars renewed and the last time I had this done it was all a bit of trial and error with a mate, a load of stainless and his tig welder. To save a load of hassle, does anybody know the internal dimension of the collars taking into account the thick gasket space required?
Cheers in advance

Give rcv4 a shout on here, he should be able to tell you!