Tunnel Ram on a 383
http://www.hotrod.com/how-to/engine/hrdp-0712-mopar-intake-manifold-comparo/
part one
http://www.hotrod.com/how-to/engine/hrdp-0801-mopar-intake-manifolds/
part two
The Weiand performed awesome in this test, even compared to the other tunnel rams they tested.
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