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Audi A4The Audi A4 model offers nimble handling and performance that makes it one of the leading cars in its class. Read more about the Audi A4 in the Audi A4 review.
With the APR chip you can turn the chip on and off using the cruise control button. And if you are looking for a used chip then try ebay, but make shore it will work with your car/engine code.