EXHAUST & EMISSIONS

This section can help you keep your exhaust system working properly. Learn how mufflers, catalytic converters and oxygen sensors work.
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How Coal Rollers Work

In a truck pull competition, excessive clouds of diesel smoke are a byproduct of the truck's functionality. But coal rollers have taken this idea from the county fair to the public roads -- all in the name of making people angry.

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

    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? See more »

  • Top 7 Ways to Reduce Your Driving Emissions without Reducing Quality of Life

    Top 7 Ways to Reduce Your Driving Emissions without Reducing Quality of Life

    Here are seven easy ways to reduce your emissions without affecting the quality of your daily commute. Learn more about the top 7 ways to reduce your driving emissions without reducing quality of life. See more »

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