The valve's performance is notably improved, reducing emissions and promoting cleaner air, all while maintaining the efficiency. 57mm 2.25inch EGR Valves Assembly For 1.9 130 160 BHP Automotive Replacement Exhaust Gas Recirculation. Lowers engine combustion temperature, reducing NOx generation at the source. Solve the problem of bad fuel consumption and reduced power. EGR valve controls the amount of exhaust gas recirculated to the intake system and reduces the emission of nitrogen oxides in the exhaust gas., Manufacturer: mangchengsm