The aFe Silver Bullet Throttle Body Spacer, part number 46-31009, is a spacer made for the 2.0-liter N20/N26 four-cylinder in the BMW 328i (F30). It mounts between the throttle body and the intake tract, so the throttle body is set on a spacer that moves the airflow point. Choose this part if you want a direct-fit bolt-on for an N20 328i intake setup, not a generic spacer that needs custom machining.
