I flowed my RPM as a unit last season. I had an Accufab 65mm TB, Performer RPM upper & lower, and TFS 1/2" phenolic spacer. The upper/lower was gasket matched and the lower was gasket matched to a 1250. Average flow was right at 230cfm with 28inH20 which was 30cfm more than the GT-40 and Explorer intakes that we flowed in the same configuration.
BTW: I've got my RPM intake system for sale if anyone is interested. Email me at
jchambers@kellnet.com.
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Jeff Chambers
1990 Mustang GT 10.032 Seconds / 137.5 MPH
14-time Street Warrior World Record Setter
CRT Performance
2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH
2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2
"There's nothing boring about a small block automatic shifting gears at 9400 rpm!"