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OOTB flows from the same flowbench for the (1) early Stealth, (2) late Stealth, (3) RPM, (4) Indy EZ

............(1)...........(2)..........(3)...........(4)

.100........66............73...........74............66
.200.......142...........141.........148..........127
.300.......209...........214.........209..........181
.400.......240...........245.........254..........232
.500.......255...........262.........276..........272
.600.......267...........276.........287..........299
.700.......268...........281.........291..........315

Even with the Indy's larger 2.19" intake valve vs the others 2.14" valve, there is no OOTB advantage to the Indy EZ until you get over .500" lift. In fact, if you look, they even don't flow as good up to .400" lift.

Keep in mind that the Stealth and the Edelbrock RPM can be hand ported to 340+ cfm and the EZ can be ported to 360+ cfm. In order to do so, it is generally required to open the ports to Max Wedge height.

Mid 330 cfm flows can be had, from the RPM and Stealth, with a stock intake port window.

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