I have never seen a comparison of the latest 440 Edelbrock dual quad int against the six pac.All of the old flat factory type intakes are way down on power as was shown in the recent Hot Rod mag tests.However it is my opinion that the newer Edelbrock might be the six pac's equal.It appears to be a dual quad Performer, much higher than the old stuff, dual plane with large runners.Edelbrock makes a very nice air cleaner to match too.Much cheaper too.