How Much Horsepower does a K&n Air Filter Add?

Answer

A typical K&N air filter will increase your car 8-16 more horsepower. If you purchase a high performance air filter, it is possible to increase your horsepower by 30 or more. You can find out more information here: www.knfilters.com
Reference:
1 Additional Answer
Despite K&N's claims that their parts add more horsepower their air filter will not change one thing in your car. The horsepower gain they claim actually comes from changing the intake pipe to one that allows more flow. So the air filter alone will do nothing in terms of increasing your horsepower.
Q&A Related to "How Much Horsepower does a K&n Air Filter Add?"
In normal everyday driving it will add no extra horsepower. In a racing situation at high rpms it will add some but not much. How much depends on the engine that it is installed on.
http://wiki.answers.com/Q/How_much_horsepower_does...
Not much, between 10 or 20. Most people prefer a different model
http://www.chacha.com/question/how-much-horsepower...
1. Let the engine cool down entirely before you begin installation, as the air intake and surrounding components may be extremely hot due to normal driving. Once the engine is cool,
http://www.ehow.com/how_12120421_gain-horsepower-k...
If you add an k&n air filter in your 1997 Ford F250, it will gain you 1-4 hp and 96 to 99 percent filtration efficiency.
http://www.kgbanswers.com/how-much-horsepower-and-...
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