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Consistent optimization of low emissions catalyst systems will require appropriate use of alternative substrate geometries. Fundamental heat transfer, mass transfer and friction characteristics provide a solid foundation for evaluating the benefits of these geometries. The purpose of this report is to validate a bench test, based on a previously reported technique, for measuring the fundamental characteristics of catalyst substrates. The sample matrix is subjected to a periodically varying inlet temperature and convective transport properties, reported as Colburn factors, are found by matching the phase shift and amplitude attenuation of the inlet and outlet temperature waves in a finite difference computer program. Flow friction attributes, reported as Fanning friction factors, are found through reduction of measured pressure loss at constant flow rate.