The Edelbrock Throttle Bodies feature throttle position sensor, throttle shaft and blade assembly, sealed ball bearing, throttle body housing and throttle return linkage assembly. Throttle bodies are superior in quality and performance. It is designed by Edelbrock and built by Magneti Marelli Powertrain USA, a major manufacturer of OEM throttle bodies. Magneti uses sophisticated machinery to electronically set the butterflies and throttle position sensors. The Edelbrock throttle bodies include all hardware for a complete installation.