Originally Posted by jrthone
Would BB-5's be better without going to PB1800 Big Duke series
In the conventional head world you need them heads I suggest or a big duke.. you could really upgrade them by going to a 3x head instead of 2x. You are very limited by that head and will loose a lot of power with them 450cfm may not be out of the question on certain flow benchs but on a good honest one I just dont see it. Still should make a 1000hp though lot of cubes with plenty of compression.