Upgrade to industry-leading filtration by installing a K&N High-Flow Air Filter™ or performance oil filter. Send us a photo of your current non-K&N filter—and we will send you a coupon code for 15% off the purchase price of either a K&N air filter or oil filter.

Follow the Steps Below to Get Your 15% Off Coupon Code

Trade Up to K&N


You have already made the choice to upgrade to industry-leading filtration by installing a K&N High-Flow Air Filter—and as a reward for your loyalty, K&N wants to offer you 15% off the purchase of a performance cold air intake system. E-mail with the subject line "Trade Up To a Cold Air Intake", attach a picture of your current K&N filter, and we will e-mail you a code for 15% off a performance cold air intake system.

TERMS AND CONDITIONS: Offer excludes K&N stainless steel washable and reusable oil filters. Limit ONE (1) discount code per customer, receipt, household, family or address, except in RI where the limit is 2, while supplies last. This offer is valid for mailing addresses in the 50 US States and DC, excluding where prohibited, restricted or taxed. Offer available to US residents 18 & older. This offer is an end-consumer discount, and is not available to groups, dealers, distributors, retailers or manufacturers’ representatives individual or stocking orders and rebate rights cannot be transferred. CANNOT BE COMBINED WITH ANY OTHER REBATE OFFER - DISCOUNT CODE CAN ONLY BE CLAIMED ONCE AND CANNOT BE APPLIED TO PRIOR PURCHASES. Offer valid on purchase of specified product(s) at only. Requests with invalid or undeliverable addresses will be denied. Not redeemable for cash, credit or gift card and no exchange, transfer or substitution permitted unless K&N, in its sole discretion, determines otherwise. K&N reserves the right to change, modify or terminate this offer due to unauthorized or ineligible use of the offer, tampering, system errors or unforeseen problems. By using your one-time discount code, entrants confirm they are at least 18 years of age and release K&N of responsibility. K&N’s Privacy Policy is available at If you have questions about your order or discount, call 800-858-3333, Monday–Friday, between 6:00 am and 4:30 pm EST. Some intake systems are not legal for sale or use on any pollution controlled motor vehicle in California or states adopting California emission procedures. See for CARB status on each part for a specific vehicle.