How Catalytic Converters Work

A catalytic converter is one of the most important parts of a car's emissions control system. It treats the exhaust before it leaves the car and removes a lot of the pollution. Learn how they work.

How Mufflers Work

Every car out there has a muffler -- it performs the crucial job of turning thousands of explosions per minute into a quiet purr. Mufflers use some cool technology to dim the roar of an engine. Learn the principles that make it work.

How do I know if my catalytic converter has failed?

Exhaust emissions test check for the absence of a catalytic converter or a malfunctioning one during an emissions inspection. Read on to learn how you can find out if your catalytic converter has failed.

How does the oxygen sensor in a car work?

An oxygen sensor in a car is a very important part of making your engine run smoothly. Learn what it does and what can happen if your oxygen sensor fails.

What is a catalytic converter and how does it work?

If you have a vehicle that needs to be tested for emissions, you might want to check on the condition of your catalytic converter. So what is it and what does it do?

Why is there a bulge in the exhaust pipe of my dirt bike?

I have a dirt bike and the exhaust pipe has this big bulge in it near the engine. What is the bulge for?