So what makes the exhaust gas recirculation valve or EGR valve an important exhaust part? Well, without the EGR valve, there's no way for exhaust gases to recirculate and undergo combustion process once again. Through this component, cooler and better fuel-burning is achieved. The EGR valve also prevents build-up of nitrogen gas, which results in safer emissions. However, the heat and carbon from the exhaust gases can stick to the EGR valve. When this happens, NOX gases start to build up, and things can get ugly. That said, your vehicle's chance to pass the emission test partly depends on the EGR valve. Exhaust experts recommend the use of performance EGR valves like the Delphi EGR Valve, which ensures good idle and better gas mileage. Auto Parts Warehouse stocks just what you need to boost your exhaust system. So don't think twice, get your own Delphi EGR Valve now! This item is available in our online catalog. Go check it out!