Performer RPM intake?

From the above referenced HOT ROD Magazine article:


#1 EDELBROCK PERFORMER RPM 383

#2HOLLEY STREET DOMINATOR

#3CLASSIC EDELBROCK DP4B

#4 EDELBROCK PERFORMER 383

Above shows the intakes rated on highest peak averages. At first I was surprised but after considering the designs on the intake this pretty much makes sense. I'm definitely not surprised about the performer RPM being #1.