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The K&N Engineering Universal XStream Top Air Filter Part Number KNNRX-4990 is designed to enhance airflow and filtration efficiency for your vehicle. Featuring a unique filter-within-a-filter design, this air filter provides increased surface area for higher air intake rates, which can improve engine performance and response. Its construction ensures outstanding filtration, making it ideal for racing and demanding driving environments where maximum airflow and protection are essential. The durable, molded pliable rubber flange offers vibration absorption and a secure fit, with the flexibility to stretch up to 1/16 inch (1.5mm) to accommodate slightly different sizes. This makes installation straightforward and reliable, ensuring consistent performance over time. The filter is washable and reusable, allowing for long-term use and cost savings. Its robust design and high-quality materials contribute to improved engine breathing, which can enhance horsepower and throttle response while maintaining clean air intake. Whether you're racing or simply seeking higher airflow for daily driving, the K&N XStream Top Air Filter delivers reliable performance and extended service intervals, making it a valuable upgrade for your vehicle. This product fits a 2005 Ford Focus and is designed to meet the demands of enthusiasts who prioritize both performance and filtration efficiency. The filter's dimensions make it suitable for a variety of applications, ensuring versatility and ease of installation for automotive enthusiasts and professional mechanics alike.
Features:
Fitment:
2005 Ford Focus ZX3
2005 Ford Focus ZX4
2005 Ford Focus ZX5
2005 Ford Focus ZXW
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).
