The invention relates to a device for optimizing fuel combustion in combustion engines comprising a housing, a top cover having a grommet for connection with a fuel line, a bottom cover having a grommet for connection with a fuel line, a first ceramic element having a multitude of bores, at least one second ceramic element having a contorted through channel, and a magnetic zone with a multitude of magnetic elements and a multitude of spring colls, both arranged alternate and longitudinally.