the cheapest one will be the one you build your self , I built my own , at about $400 for the raw material , it's cheap that way if you don't include the 200 hours bending runners and tigging it all together
I think you might want to look at Charlie's lastpost at the other sight where the sheetmetal didn't workas good as the old TFS tunnel ram. You are better off welding on a cast intake and flowing it. less investment with a marginal to good return, not $2000..plus with no gain
You get what you pay for CFE is doing a new intake to go along with my new set of Thor heads
I bought a fabbed manifold back in the late 80s . It would not have been cheap if it was $150 . P O S that was only good for keeping the oil inside the engine . Bottom line , IMO , is not to buy one unless you know someone that has ran the design with good results .
Somethings are not cheap at any price .
stay away from that intake on e-bay!!! If you look at the photos in the extra pictures, you can see where the verticle back and front walls are right at the edge of the port. That will mess up your fuel distribution considerably.There needs to be a 90 deg turn at the mouth of the port to match the rest of them.Basically the plenum is not long enough, and there is usually a stagger ,so both sides are the same.