gas mileage and catalyzer mods

[Ernie Italy]

A standard catalyzer is ceramic and have 1200 cps (cell per square inch).
With a sports catalyzer you can have a 200 cps (as I have installed)... the output gas goes out more freely and performance and gas economy have benefit.. you can have a 4.33% in power and 13% in torque. Yes I know I have to tested and analyze , but take in consideration that is one of mods that use sports car.
When I have change my cats (change not modify and I can return to stock when I want) the same mods are do it on a Ferrari 340...