This is Abaco Performance's flow bench. It is the highest flowing test bench ever designed, built and certified by Flow Systems, with a flow rating of 2200cfm and 5500KG/H.

You may recognize some of Flow Systems' other clients: Boeing, Borg Warner Automotive, Cummins Engine Co., Daimler-Chrysler, Delphi Automotive, FORD motor co., General Motors Co., Mitsubishi Power System, NASA Marshall Space Flight Center.

It takes a blower this big to supply enough air volume to ensure accurate
 CFM measurements.