What is a flowbench?             A flowbench is a device to measure airflow resistance  (NOT AIR AND FUEL RESISTANCE) through a mechanical component such as a cylinder head or intake manifold. The result can be expressed as a Coefficient of Discharge of the component or as an airflow rate.             Volumetric flow is determined by the ratio of the pressure drop through the             component under test to the pressure drop across a calibrated orifice.             This measurement principle ensures results which are independent of              atmospheric conditions.             Most Flowbenches can be used in either Intake or Exhaust mode. Virtually every             engine component which is in the inlet air or exhaust gas path can be tested and             improved on a Flowbench.If you want your heads tested on the flowbench i will send thim out for testing.Price is $100 per pr. Flo figures of A.J.Sims CB044 Heads Back to heads page     To order your heads