Part of your car's exhaust system that turns toxic combustion gases into less harmful emissions. It protects both the environment and human health by reducing dangerous smog-forming pollutants before they can leave your tailpipe.How it WorksThe device acts as a chemical filter, treating your exhaust in two main stages using precious metals like platinum, palladium, and rhodium:The Reduction Catalyst (First Stage): Uses platinum and rhodium to strip oxygen atoms off harmful nitrogen oxides, turning them into harmless nitrogen gas.