Neil the manifold will it be cut for expansion / distortion. As lve read one piece can cause problems shearing bolts.
LOL Glen, come on you know what a sump looks like.Whats that thing on the bottom of the engine that looks like a sump
SWEET :bowdown1:The problem with alot of after market manifold is that they are mass produced and a few small things have been over looked like not using the right bends for the job,bending bends and welding them together under stress which can lead to distortion and cracking.
My manifold has been made where each primarys has been made to fit without any stress or preload before it's welded up and using the correct bends for the job.
I think that their answer will be to do with keeping all 6 legs the same length. It's gas that's flowing not a liquid so friction will play little part in it. As there are no constrictions, the leg shape will have little bearing on it's ability to clear the waste gases. Just my opinion of course.I haven't questioned their design but on monday i'll ask them why 1 and 6 are like this as opposed to the more obvious design.