Paul:
Are you aware of an research done on the effects of using induction
tubing of square or rectangular x-section?

You've mentioned using rectangular exhaust tubing in the past, I know,
but I've been thinking that fabrication of intake systems would be
easier if one could make critical components from sheet goods instead of
buying/making all sorts of sophisticated bends from stainless or
aluminum tubing.

R. Berglund

I should work. For a given cross sectional area there is more skin friction
drag.

I found a much cheaper source for tubing.
http://www.siliconeintakes.com/

Half the price of Burns stainless.

Paul Lamar