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The K&N Engineering 57S-4001 Performance Air Intake System is designed for the 2011–2019 Ford Ranger with a 3.2L L5 diesel engine. This intake system replaces the restrictive factory air filter and intake housing with an engineered air path intended to provide virtually unrestricted airflow to the engine.
The system uses a non-metallic, rotationally molded tube designed to help reduce air temperature and intake sound compared with a metal tube. By replacing the complete air path between the filter and engine, the kit addresses airflow restriction that may remain when only the air filter is replaced.
K&N states that the kit is easy to install, usually in 60 minutes or less, and includes the brand’s No-Hassle Lifetime Limited Warranty. Associated products include the K&N 22-8049DK Air Filter Wrap and 99-5000 Filter Care Service Kit Aerosol. This product is not CARB approved; applicable regulatory requirements should be reviewed before installation or use.
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).
