Abstract: Apparatus for magnetically conditioning incoming air and fuel to an internal combustion engine to improve engine operation. Magnets are applied in a bipolar arrangement to the fuel system and air intake apparatus of an internal combustion engine system for reducing emissions and improving fuel efficiency. Magnets may also be applied in a bipolar arrangement to the exhaust system and catalytic converter of an internal combustion system of automotive type for reducing exhaust emissions and improving the performance of a catalytic converter. Furthermore, a combination of magnetizing apparatus that, in conjunction with air and fuel magnetizing apparatus, will improve engine efficiency by introducing a magnetic charge to engine exhaust, coolant water, engine oil, transmission fluid, and gear box fluid, in combination with the above embodiment.