The Weiand tunnelram in stock form beat all other intakes tested in a Hot Rod magazine feature story a few years back, i believe it was a warmed over 440 as the test engine. These guys are trying to re-invent the wheel and only charging more money and not vastly improving anything.
Here's the article for those interested: (The tunnel ram figures are at the end of Part 2)
https://www.hotrod.com/articles/hrdp-0712-mopar-intake-manifold-comparo/https://www.hotrod.com/articles/hrdp-0801-mopar-intake-manifolds/
