Exhaust systems serve four main purposes: 1) to remove combustion gases from the engine and vent them safely, 2) to reduce engine exhaust noise, 3) to remove waste heat from the engine which can be reused to add power through turbocharging, and 4) to allow for after-combustion emission controls like air injection, exhaust gas recirculation, oxygen sensors, and catalytic converters. Typical exhaust systems include headers, manifolds, pipes, and a catalytic converter and muffler to clean emissions and muffle noise before venting gases outside the vehicle.

1. AUTOMOTIVE EXHAUST
SYSTEM

2. Exhaust Systems are neededto:
• Remove combustion gases from engine and vent to safe place for
passengers
• Reduce engine exhaustnoise
• Remove waste heat from engine or
• Use heat to add power with turbocharging
• Allow for after combustion emission controls
– AirInjection
– EGR
– Air-Fuel ratio sensors and O2 Sensors
– Catalytic Converters

3. Typical OEM Stainless Steel Tube
style exhaustheader

4. And what it looks like in the real world…

5. OEM Cast Iron Manifold

6. And NASA said:
“Let there be Titanium”
And there was, and it was GOOOOD!!!

7. ENGINE HEAT CAN BE REUSED TO ADD
POWER WITH TURBOCHARGING
I’m going to Huff! and Puff!
andBLOWyour piston
down!

8. Air Injection to exhaustmanifold helps to reduce HC and CO emissions

9. Exhaustmanifold is pick-up point for EGR gases that reduce Nox
emissions

10. You canfind the O2 sensor in either the exhaustmanifold, pipe or both.

11. From the exhaustflange back, add a CatalyticConverter to finish the job of
cleaning things up, and a resonator and muffler to mellow the sound…you
have an EXHAUST SYSTEM

12. Of course, people love to tinker and the exhaustsystem is no exception

13. So, by the time you get done installingyour coffee-can
exhaust…

14. Your ride will be the envy of ALL!

15. QUESTIONS?