I did indeed see your previous post and thank you for your interest.
You should get that intake system of yours on and let the rest of us know how it works out along with pics of course.
I must say that a 5.0ltr Mantula is nuts and I bet it goes like a rocket!
There have been two Mantula's that I have seen recently one this past week but I don't think they have the warp drive system you have

Mine is coming along quite nicely now even though I made a mistake with the foam thickness and my mate the Cave Troll was very keen on making this the point of conversation for the evening whilst I in turn questioned his parentage!
I did not notice that I had bonded two lots of 20mm and two lots of 25mm when it should have 25mm throughout so when we came to angle the pipes into the housing there was not enough to bore into.
What a pillock ! (Mike no need for your thoughts on that point thank you!)
With a new section cut and bonded to the top we could continue and by the end of the evening we finally had this.

Now question time for all of you following this please could I have your thoughts on whether I should keep the sides like this...

Or should I taper it from this back to a point at the rear of the housing.

As always open to ideas and suggestions .
Thanks all and catch you later
P