Update!
Getting a little further with the exhausts manifolds. Won't get chance to do anything tomorrow as it Pride of Longbridge.
Sunday I'll try an get over to my friends workshop to use his welder. Should be finished and on by mid next week.
Will first fit using the standard primarys, So I have a better idea if my secondarys and collector have actually made a difference.
After that I will fit the primarys I have filed the welds out off an see if that helps a little.
After that will maybe try an join each bank with an X pipe and see how that works too.
Here's a couple of pics from today of the rough layout I have now.
Threaded Mode