Q: How Does the Cylinder Head and Valvetronic System Enhance Performance and Emissions?A: First of all, engines with an N52 have an aluminum-based cylinder head and a Valvetronic actuator motor. Also, the engine control module manages this system, using engine speed, load, and coolant temperature. It also uses Valvetronic to regulate power as well as torque, enhancing efficiency and mitigating emissions on your vehicle.