Buy a K&N air intake system from KNfilters.com and "Test Drive" it for 30 days at no risk to you. Save the original shipping box and packing list. If you are not completely satisfied and wish to return your intake, simply call customer support team for a no-hassle return.Offer valid only for purchases made directly from KNFilters.com. Offer limited to K&N air intake part numbers beginning with 57, 63, 77, or 69. Offer limited to USA shipping addresses and USA return addresses. Offer limited to one intake kit return per household or address.