The valve's performance is notably improved, reducing emissions and promoting cleaner air, all while maintaining the efficiency. Aluminum EGR Valve Kit For BMW For M47N2 For M57N2 For E60/61/87/90/92/93 320 325D 330D 525D 530D 520I For X3 For X6 For X5 11717804381 11717792077. Optimized internal flow channel design reduces exhaust flow resistance and minimizes power loss. The function of the EGR valve is to control the flow of recirculated exhaust gases depending on the engine load. 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