Here is an end view of Random Technologies' racing catalytic converters. We have two densities, one that is 100 cells per square inch (right) and one that has 300 cells per square inch. If the 100 count cat can do the job, it would be preferable because it allows more flow over the 300 count cat. These units run red hot and easily combust the unspent fuel. Research is ongoing to develop racing cats that can withstand the rigors of short track racing. Street performance cars don't run upwards of 7,000 rpm like many race cars. We feel that with the use of fuel-injection and computer monitoring of the air/fuel ratio at all rpm levels, the cats would survive much better in that environment than with carburetors with their low rpm fuel rich tendencies.