Induction and Engine Airflow Systems What are the three basic regulating components of a sea-level boosted turbocharger system? 1. Exhaust bypass assembly. 2. Compressor assembly. 3. Pump and bearing casing. 4. Density controller. 5. Differential pressure controller. a. 2, 3, 4. b. 1, 4, 5. c. 1, 2, 3.