This is a claim made by an Ebay seller who's selling an Offy 4 barrel intake...
"54HP gain by installing this manifold and a Holley. 115HP gain with the addition of a cam, and 145+ with the addition of headers." :rolleyes:
I have a 500 cfm Edelbrock on the same manifold along with a cam and long headers on a 292, but nowhere near 145 HP gain he claims!
All my gains don't even add up to the 54 HP improvement he claims you can get with JUST the addition of the manifold and carb! :p
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=36474&item=2454337470
