Flow Test Information

Third-party flow testing on a computer controlled SuperFlow SF-600 demonstrate the high flow ability of the Extrudabody aero-shaft and air-horn designs.  Most notably, our 40mm product flows 5% more air than a leading competitor with a generic air horn.

Type Bore Size Total Length Airhorn / Velocity Stack CFM
Extrudabody 45mm 3.75" 5x45mm Extrudabody 292.2
Extrudabody 40mm 3.75" 5x40mm Extrudabody 217.1
Extrudabody 40mm 5.875" 5x40mm Extrudabody +
50mm Extension		 216.1
Competitor 40mm 3.5" None 190.2
Competitor 40mm 6.875" 1.5" Extension + Generic Horn 206.1

Have a small block v8 and worried that you need 48 or 50mm ITBs?  Well before you decide against 45mm ITBs, did you know that even race heads rarely flow more than 280 CFM (see http://www.airflowresearch.com/chp_test.php).  Our 45mm ITB flows 292 CFM, which is a nice match for even modified small blocks.

Testing Parameters:  (see pictures of setup below)

  • Tester:  Devine Automotive Machines
  • Throttle Plates set to WOT
  • Standard pressure used (20.5") for all tests
  • Fuel injectors installed
  • Room temp 72 degrees BP @ 28.54
  • TTest plate 5/8" thick, mounted on 4" diameter cylinder head adapter
  • SuperFlow SF-600 with FlowCom
SuperFlow Test Setup Pictures:

 Extrudabody ITB Flow Test
Extrudabody ITB Flow Test