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The K&N Engineering Diesel Dryflow Lifetime Engine Air Filter is a washable, reusable drop-in replacement filter designed for select 2007–2008 Dodge Ram applications with a 6.7L diesel engine. Part number E-0784HKB, it is designed to install into the factory air box for a straightforward replacement.
Its layered cotton and synthetic filter media is engineered to improve airflow while capturing contaminants. The reusable design is built to last for the lifespan of the vehicle and is backed by K&N’s No-Hassle Lifetime Limited Warranty.
This performance air filter is proudly designed, engineered, and made in the USA using premium materials. Dedicated U.S.-based customer service supports the product, and K&N Filter Cleaner Synthetic 32-ounce Spray is listed as an associated product for maintenance.
This product is listed for the 2007–2008 Dodge Ram 2500 and 3500 with a 6.7L diesel engine. California Air Resources Board approval is not stated in the product data; applicable emissions requirements should be reviewed before installation.
Features:
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
