Horsepower Guarantee

Applicable only for Air intake Systems purchased and installed in the U.S.A.

K&N Intake Kits are Guaranteed to Increase Power!

Every K&N air intake system we design has been tested on a chassis dynamometer to establish that it will provide an increase in horsepower to the drive wheels of the vehicle.* We publish estimated horsepower increases to allow consumers an opportunity to view a real test result for a specific or similar vehicle even though the actual results a consumer will receive will vary depending on such things as the condition of the vehicle, weather, fuel, and other circumstances.

Our horsepower guarantee is simple and straightforward. If you are the original retail purchaser of a K&N intake system, we offer an unconditional 30 day money back guarantee. If you are unhappy with a K&N intake system for any reason, including the horsepower improvement experienced, we will refund 100% of the purchase price and even pay for return shipping to K&N.

If you are not completely satisfied and wish to return your intake, simply call our customer support team in Riverside, California at 800-858-3333 within 30 days of the original purchase. Provide your name, address, contact information, and original purchase price. We will issue a return authorization number to you. We can also send you a shipping label to get the intake returned at no cost to you. Then use the shipping label to return the complete air intake system (including all parts and components) in an undamaged condition (exclusive of ordinary wear and tear and markings from installation) in the original packaging, together with the original proof of purchase, clearly showing the date of purchase and amount paid. Make sure that the shipping label clearly indicates the return authorization number. A check for the refund will be sent, within 30 days of receipt, to the name and address provided.

This guarantee does not apply to any other costs incurred by the original purchaser, including, but not limited to, dynamometer testing, parts and labor for the installation or removal of the air intake system, loss of use, or other incidental costs.

* Please note that the horsepower rating that a motor vehicle manufacturer advertises is usually measured at the crankshaft of the engine using an engine dynamometer. There is generally a parasitic loss of horsepower between the crankshaft and drive wheels, which is caused by the drivetrain of the vehicle. This means we will often show absolute horsepower numbers that are lower than the vehicle manufacturer since we are measuring the horsepower that reaches the road.

K&N Estimated Horsepower Gains