Neighbors Help a Beloved Crossing Guard YouTube Verus Engineering CK5 Bonnet Louver Kit. Reduce engine bay heat and pressure with our lightweight and affordable hood louver kit. By utilizing the OEM hood with purposefully placed, built, and tested louvers; weight is kept lower than most carbon vented hoods. The Verus Engineering Hood Louver Rain Guard Kit helps collect and dump water on the radiator and shroud. This keeps water from dumping on the rest of the engine bay.