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The K&N Engineering E-0644HBK Diesel Dryflow Air Filter is a washable, reusable replacement filter designed for select 2017 Ford F-250 and F-350 Super Duty models equipped with the 6.7L V8 diesel engine. This drop-in filter is designed to install easily into the factory air box, providing a direct replacement option for the original air filter.
Its layered cotton and synthetic media is engineered to improve airflow while capturing contaminants. The performance-focused design is intended to help increase horsepower while supporting clean air delivery to the engine.
Built for repeated use, the E-0644HBK can be washed and reused and is engineered to last for the entire lifespan of the vehicle. K&N supports this filter with a No-Hassle Lifetime Limited Warranty. Associated cleaning product: K&N 99-0624 Synthetic Filter Cleaner, 32 oz Spray.
Proudly designed, engineered, and made in the USA using premium materials, this K&N replacement air filter is backed by dedicated U.S.-based customer service. Review vehicle application details before installation to confirm fitment.
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).
