This is hands down the best intake for small block Mopar running to 6800 RPM. It gives up very little top end top end to the Victor series or M1 intake, but makes tons more horsepower and torque below 4000 RPM. If you're not spinning to the moon, or putting any street miles on your Mopar, the Air Gap is the winner hands-down.
Edelbrock's Performer RPM Air-Gap intake manifolds incorporate race-winning technology that's been used on Victor series competition intakes for years. The open air space from the Air-Gap design separates the runners from the heat of the lifter-valley cover. So, the air/fuel mixture stays cooler all the way to the heads, which produces a denser charge for more power. Runners are tuned to move the power band 1,000 rpm higher than Performer Air-Gap manifolds, from idle-5,500 rpm up to 1,500-6,500 rpm.