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The K&N Engineering SU-9921 High-Flow Air Filter is designed for select Suzuki GSX-S1000 motorcycles. Its pleated cotton media provides a large filtration area intended to support low restriction, high capacity, and extended service intervals, while multiple layers of woven cotton gauze help provide effective engine air filtration.
Built with premium oiled cotton gauze, this washable and reusable motorcycle air filter is pre-oiled and ready to ride. The application-specific base seal and sealing bead support a precision OEM-style fit for straightforward installation where applicable, while the durable construction is designed for long-lasting performance.
The SU-9921 is engineered to support increased horsepower and torque, along with improved throttle response and acceleration. It is made in the USA and includes K&N Engineering's No-Hassle Lifetime Limited Warranty. Compatible applications include select 2022–2024 Suzuki GSX-S1000 ABS, GSX-S1000GT, GSX-S1000GT+, and GSX-S1000GX+ motorcycles.
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).
