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Click the button above if you would like to find a retailer in your area.
Click the button above if you aren't sure which plug to buy.
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Power/Performance Tuning
Keeping your engine in prime condition is an important factor in obtaining the highest possible performance. The Performance Tuning section helps you diagnose various problems that may affect the output of your engine.
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Tuner's Tales
We don't make this stuff up! Find out for yourself how DENSO Iridium plugs can increase the performance of your car.
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Heat Ranges
Cold Plugs? Hot Plugs? Don't know what it means? Click the link to find out!
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How to Read Used Plugs
How do you read spark plugs? Is there some way of knowing what's wrong with your engine? Find out how you can see what's going on in your car by reading the spark plugs.
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Common Engine Problems
What are some of the problems that cause poor performance in your car? Click here to find out. |
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