Charging, Turbo charger, <a href="https://garage.wiki/bmw/engines/gasoline/straight-3/15-l/b38-b15-a/107-hp.html" title="BMW gasoline straight-3 1.5 L B38 B15 A 107 HP engine DIY maintenance and service manual">BMW gasoline straight-3 1.5 L B38 B15 A 107 HP</a>, At the cylinder head, First stage

by Roman Paulov