K&N 33-2431 High-Flow Replacement Air Filter Ford Mustang
- Genuine K&N High-Flow Replacement Air Filter
- SKU: 33-2431
- Washable & reusable performance panel filter
- Multi-layer oiled cotton-gauze filter media
- Designed for improved airflow through the factory intake system
- Direct replacement for the standard factory air filter
- Pre-oiled and ready to install
- Dimensions: 311 × 244 × 32 mm
- Uses the original factory airbox
- K&N No-Hassle Lifetime Limited Warranty
Only 1 left in stock
Delivery & Return
We aim to dispatch orders as quickly as possible using reliable UK courier services. Delivery times can vary depending on stock availability, supplier location and the type of product ordered.
Estimated delivery times are shown where available, but these should be treated as a guide rather than a guaranteed delivery date.
Some specialist, made-to-order, imported or supplier-direct performance parts may take longer to arrive. If you need a part by a specific date, we recommend checking availability before ordering.
Once your order has been dispatched, tracking information will be provided where available.
UK Delivery
We deliver throughout the United Kingdom.
Shipping charges are calculated at checkout based on the size, weight and destination of your order. Larger or heavier items may have an additional delivery charge.
Deliveries to the Scottish Highlands, Northern Ireland, Isle of Man, Isle of Wight, Channel Islands and other remote locations may take longer or incur additional charges.
International Delivery
International shipping may be available for selected products and destinations.
Import duties, taxes, customs charges and local handling fees are the responsibility of the customer unless stated otherwise. These charges are not included in the product price or standard shipping cost.
Please check your local import requirements before placing an international order.
Incorrect, Damaged or Faulty Items
Please inspect your order as soon as it arrives.
If your item is damaged in transit, faulty or different from what you ordered, contact us as soon as possible with your order number and clear photographs where relevant.
We will review the issue and advise you of the appropriate next steps.
Vehicle Fitment & Compatibility
It is the customer’s responsibility to check that a product is suitable for their vehicle before installation.
Please verify the vehicle model, year, engine, chassis code, part number and any relevant brake, suspension or drivetrain specification before ordering.
If you are unsure about compatibility, contact us before purchase with your vehicle registration or VIN and the product SKU where possible.
We cannot accept responsibility for incorrect fitment caused by inaccurate vehicle information, non-standard modifications or aftermarket conversions that were not disclosed before purchase.
Special Order & Made-to-Order Products
Some performance parts are specially ordered, imported, customised or manufactured specifically for a customer.
These products may be subject to different cancellation and return conditions. Where applicable, this will be confirmed before the order is processed.
Refunds
Approved refunds are normally issued back to the original payment method after the returned item has been received and inspected.
Original delivery charges and return postage may not be refundable unless the item is faulty, damaged or supplied incorrectly.
Please allow time for your bank or payment provider to process the refund after it has been issued.
Need Help?
If you have any questions about delivery, returns or product compatibility, please contact Performance Car Parts UK before ordering. We will be happy to help you check product details and fitment information.
K&N 33-2431 High-Flow Replacement Air Filter for Ford Mustang
Upgrade your Ford Mustang’s factory air filtration with the K&N 33-2431 High-Flow Replacement Air Filter. Designed as a direct replacement for the standard disposable panel filter, this premium K&N performance air filter fits inside the original factory airbox while providing improved airflow and dependable engine protection.
The K&N 33-2431 air filter uses multiple layers of specially treated cotton-gauze filter media engineered to capture harmful contaminants while allowing increased airflow into the engine. Unlike conventional paper filters that require regular replacement, the K&N filter is washable and reusable, making it an excellent long-term upgrade for performance-focused Mustang owners.
High-Flow Performance Without Replacing the Factory Airbox
K&N’s replacement air filters are designed for drivers who want improved airflow while retaining the vehicle’s original intake system. The 33-2431 simply replaces the factory air filter inside the standard airbox, making installation straightforward with no permanent vehicle modifications required.
The high-flow cotton-gauze construction is designed to reduce unnecessary airflow restriction compared with conventional disposable filtration while maintaining effective filtration of contaminants entering the engine.
Washable & Reusable Performance Filter
Instead of regularly purchasing replacement paper filters, the K&N 33-2431 can be cleaned, re-oiled and reused. K&N states that under normal highway driving conditions its High-Flow air filters may go for up to approximately 75,000 miles between cleaning intervals, although servicing frequency should always reflect the vehicle’s operating environment.
The filter arrives pre-oiled and ready to install.
Key Features
- Genuine K&N High-Flow Replacement Air Filter
- Part number: 33-2431
- Designed as a direct replacement for the factory panel air filter
- Washable and reusable construction
- Multi-layer oiled cotton-gauze filtration media
- Engineered to improve airflow through the factory intake system
- Designed to support engine performance and acceleration
- Retains the vehicle’s original factory airbox
- Pre-oiled and ready for installation
- Simple drop-in installation
- Approximately 311 mm long × 244 mm wide × 32 mm high
- K&N No-Hassle Lifetime Limited Warranty
Why Choose a K&N Replacement Air Filter?
K&N is one of the best-known manufacturers of reusable performance filtration products. The 33-2431 provides a simple way to upgrade your Mustang’s intake filtration without installing a complete induction kit. Its reusable design can also reduce the number of disposable air filters required throughout the life of the vehicle.
Installation
The K&N 33-2431 installs into the vehicle’s existing air filter housing and requires no modification to the factory intake system. K&N lists the typical installation time at approximately 5–10 minutes, with basic tools such as a screwdriver normally sufficient.
Important Fitment Information
This filter is used on selected Ford Mustang applications. Vehicle compatibility varies according to model year and engine specification. Please confirm the vehicle details and K&N part number 33-2431 before ordering.
Frequently Asked Questions
Is the K&N 33-2431 washable?
Yes. The 33-2431 is a washable and reusable K&N High-Flow air filter. It can be cleaned and re-oiled using an appropriate K&N filter cleaning kit.
Does K&N 33-2431 replace the factory air filter?
Yes. It is designed as a direct replacement panel filter that installs inside the original factory airbox.
Does the K&N 33-2431 require an intake kit?
No. The filter works with the vehicle’s standard air filter housing and factory intake system.
Is K&N 33-2431 supplied pre-oiled?
Yes. K&N supplies the filter pre-oiled and ready for installation.
How often should the K&N 33-2431 be cleaned?
K&N states that its High-Flow replacement filters can typically operate for up to around 75,000 miles between cleaning intervals under normal highway conditions. Vehicles driven in dusty or harsh environments may require more frequent servicing.
What are the dimensions of K&N 33-2431?
The filter measures approximately 311 mm long, 244 mm wide and 32 mm high.
Technical Specification
| Brand | K&N |
| Manufacturer Part Number | 33-2431 |
| Product Type | High-Flow Replacement Engine Air Filter |
| Filter Style | Panel |
| Filter Material | Oiled Cotton Gauze |
| Washable | Yes |
| Reusable | Yes |
| Installation Type | Direct Replacement / Factory Airbox |
| Outside Length | 311 mm / 12.25 in |
| Outside Width | 244 mm / 9.625 in |
| Height | 32 mm / 1.25 in |
| Filter Re-Oiling Amount | 50 ml / 1.69 oz |
| Package Quantity | 1 Air Filter |
| Approx. Weight | 0.9 kg / 1.9 lb |
| Filter Range | K&N High-Flow Original |
| Airflow Test | 450 CFM @ 1.5 inH₂O restriction |
| Overall Filtration Efficiency | 99.30% under K&N ISO 5011 test conditions |
| Warranty | K&N No-Hassle Lifetime Limited Warranty |
Vehicle Fitment
| Year | Make | Model | Submodel / Trim | Engine |
|---|---|---|---|---|
| 2010 | Ford | Mustang | GT | 4.6L V8 |
| 2011–2014 | Ford | Mustang | V6 | 3.7L V6 |
| 2011–2014 | Ford | Mustang | GT | 5.0L V8 |
| 2012–2013 | Ford | Mustang | Boss 302 | 5.0L V8 |
| Weight | 1.88 lbs |
|---|---|
| Dimensions | 14.063 × 11.125 × 1.875 in |
Delivery & Returns
UK Delivery
We deliver throughout the United Kingdom using reliable courier services. Delivery times vary depending on stock availability, supplier location, product size and destination.
Shipping charges are calculated at checkout where applicable. Larger, heavier, specialist or supplier-direct items may incur additional delivery charges.
Dispatch Times
We aim to dispatch in-stock products as quickly as possible. Some specialist, imported, made-to-order or supplier-direct performance parts may require additional processing time.
If you require a product by a specific date, please contact us before ordering so availability can be checked.
Tracking
Tracking information will be provided where available once your order has been dispatched.
International Delivery
International shipping may be available for selected products and destinations. Import duties, taxes, customs charges and local handling fees are normally the responsibility of the customer unless otherwise stated.
Returns
Please contact us before returning an item. Products should be returned in accordance with our returns policy and in suitable condition where applicable.
Special-order, made-to-order, customised or imported products may be subject to different cancellation and return conditions.
Damaged, Faulty or Incorrect Items
Please inspect your order as soon as it arrives. If an item is damaged, faulty or different from what you ordered, contact us promptly with your order number and clear photographs where relevant.
Vehicle Fitment
It is the customer’s responsibility to confirm product compatibility before installation. If you are unsure, contact us with your vehicle registration or VIN and the product SKU before ordering.
