Quote: "The 440 performer is much better than a CH4"
no it's not. I think you are thinking of a Performer RPM, that is a totally different intake. CC or MM did an intake shoot out and the CH4B did very well even stacked against the new designed intakes.
Looking here at the picture side by side. You should be able to tell the performer 440 has more pad and plenum height. Once divided the Performers runners are longer, wider, taller, faster , stronger...
Timing, dead spark plug, and you ran it out on the dyno?
packages take out the guess work. Use them.
The CH4 intake is a great intake with a AVS carb, mild cam 440 2.76-3.23 gears.
