The difference and even the one of the right has had a little fettling done before I thought is fetching the camera.
Fisnished item ............................ over 2 mm has been removed in some places and there is still a slight lip as I did not want to weaken the welding and cause a failure of the weld in use. Of course we have no way of telling if this will give any improvement in power output without a before and aftr testing on the Dyno/Rolling Road which of course is not going to happen!
Of course bearing in mind what results are achieved through porting of a head this surely must provide better flow and thus better performance and althoguh I would love to take the credit for this idea it was not mine really. I saw a thread over on the .Org forums on such treatment of the manifold and it was there that the chap measured the tube lenghts and found the 6 stud to be better that the 4 stud so as this one came with the S/S Super Sports exhaust it seemed silly not to use it. As my Dremel packed up the other month I used a large round file and did it all by hand.
Of course this won't replace a proper performance tubular manifold like the Piper but the cost of such a manifold is just out of the question for the fore seeable future so this will just have to suffice for now.