K&N / UNIVERSAL FILTERS
Measure it.
Make it fit.
K&N RU-5281 Universal Air Filter — 2¾in
A unique universal filter with washable oiled cotton gauze. Connection: 2¾ in (69.9 mm, converted from K&N title). Height: 5.313 in (135 mm). Match the connection and available installation space before ordering.
£104.99
Includes VAT at 20% · Great Britain delivery included
Review £104.99 total for one filter, including VAT and Great Britain delivery, before paying.
Buy now ↗England, Scotland and Wales only. Northern Ireland, Channel Islands and Isle of Man excluded.
Dimension check: The 2¾-inch connection comes from K&N’s product title; the millimetre value is a conversion. K&N’s specification table does not state a flange length, so confirm the mounting length before ordering.
Detail
Product details
A unique universal filter with washable oiled cotton gauze. Connection: 2¾ in (69.9 mm, converted from K&N title). Height: 5.313 in (135 mm). Match the connection and available installation space before ordering.
Delivery & ordering
Estimated delivery: 3–5 working days.
Supplied to order from our supplier; stock is not held in the TTRP warehouse. Estimates depend on supplier order acceptance, current availability and the delivery address. Great Britain delivery included. England, Scotland and Wales only; Northern Ireland, Channel Islands and Isle of Man excluded.
Before you pay
Check dimensions and fitment, then read our delivery information, returns policy and terms. For a fitment enquiry, include the connection measurements and a photo of the intake.
Ask about RU-5281 ↗Features
Features
- Select by inlet, body dimensions and mounting space.
- Washable cotton gauze filter media.
- Manufacturer specifications and product image sourced from K&N.
Delivery
Delivery information
Estimated delivery: 3–5 working days.
Great Britain delivery included. England, Scotland and Wales only; Northern Ireland, Channel Islands and Isle of Man excluded.
Delivery to England, Scotland and Wales only. Northern Ireland, Channel Islands and Isle of Man are excluded. Working days exclude weekends and bank holidays. Estimates are not guaranteed; contact us before ordering if you need a specific date.
Returns
If you’re not happy with your item or you’ve changed your mind.
We want you to be happy with your purchase. If you need to return something, contact orders@ttrpracing.com with your order number and the item details, and we’ll help you through the process.
Under 14 days
- Tell us you wish to cancel within 14 days, starting the day after you receive your goods. You then have a further 14 days to send them back. You can request an exchange, subject to availability.
- You pay the direct return costs for a change-of-mind return. We recommend a tracked service and appropriate insurance. Keep proof of posting.
- You may open the packaging and inspect an item as you would in a shop. We may deduct for loss in value caused by handling beyond what is necessary to check its nature, characteristics and functioning. Opening the packaging alone does not remove your cancellation rights.
- Return all supplied parts and packaging where possible. Pack the item securely in an outer box; avoid attaching courier labels or tape directly to the product packaging.
- Include your name, order number and contact details so we can identify your return. A returns form or a reason for cancelling is not required to exercise your statutory cancellation rights.
- We do not charge a restocking fee. For a statutory cancellation, we refund within 14 days of receiving the goods or evidence you sent them back, whichever is earlier. We refund the item price and standard outbound delivery paid; any extra paid for optional premium delivery is excluded. Refunds use your original payment method.
After 14 days
We do not offer change-of-mind returns where you first notify us after the 14-day cancellation period. Your rights for faulty, incorrect or misdescribed goods are separate and continue to apply.
Exclusions from change-of-mind returns
The cancellation right does not normally apply to goods made to your specifications or clearly personalised, including genuinely bespoke cut-to-length items. Any applicable exclusion will be identified before ordering. A standard product being ordered from a supplier or described as a “special order” does not, by itself, remove your cancellation rights. These exclusions do not affect rights for faulty or misdescribed goods.
If your product becomes faulty.
Contact our customer service team with your order number and a description of the fault. We may suggest basic troubleshooting or manufacturer support where helpful, but this does not replace your rights against us as the seller.
Under 30 days
- If goods are faulty, not as described or unfit for their agreed purpose, consumers normally have a 30-day short-term right to reject them for a refund. You can ask about an exchange instead.
- Contact us for return arrangements. Include a description of the problem and your order reference. We will inspect the item and cover reasonable return carriage for a valid faulty-item claim.
- If we cannot reproduce a reported fault, we will discuss the findings and next steps with you. We will explain and agree any proposed charge before incurring it; your statutory rights remain unaffected.
After 30 days
You may still be entitled to a repair or replacement and, where the legal conditions are met, a price reduction or refund. We will carry out a statutory repair or replacement within a reasonable time, without significant inconvenience and at no cost to you, including necessary postage. Your rights are not limited to the manufacturer’s warranty. We can also help with a separate manufacturer warranty where supplied.
Damage, installation and wear
Damage caused by misuse, incorrect installation or normal wear is not a manufacturing defect. An exclusion applies only where it caused the problem being claimed for. We recommend professional installation where appropriate; this does not remove your statutory rights.
How to contact us or cancel
Email a clear cancellation statement to orders@ttrpracing.com, including your name, address, order details and delivery date. You can also write to Trading Parts UK Ltd, 19 Heathfield Rise, Rishworth, Sowerby Bridge, HX6 4RS. Contact us to confirm return instructions; our approval is not required for a statutory cancellation.
This consumer policy applies to new direct website orders from 27 October 2026. Any longer returns period promised when you placed an earlier order remains available. Marketplace purchases follow the marketplace support process; business orders follow the terms agreed in their quote. Your statutory consumer rights are unaffected.
K&N SPECIFICATIONS / INSTALLATION
Check every dimension.
Universal dimension-based installation only. K&N does not establish a vehicle make/model fitment from the product name. Match the full connection dimensions, filter body size and flange length; check clearance, secure support, intake sensors and breather connections. Adapters and vehicle-specific pipework are not included. The 2¾-inch connection comes from K&N’s product title; the millimetre value is a conversion. K&N’s specification table does not state a flange length, so confirm the mounting length before ordering.
| Brand / part number | K&N / RU-5281 |
|---|---|
| Air Filter Shape | Unique |
| Height | 5.313 in (135 mm) |
| Package Contents | 1 Air Filter |
| Washable | Yes |
| Air Filter Material | Cotton Gauze |
| Base Outside Length | 6.563 in (167 mm) |
| Base Outside Width | 3.875 in (98 mm) |
| Top Outside Length | 5.188 in (132 mm) |
| Top Outside Width | 2.5 in (64 mm) |
| Warranty | 1 Year Limited |
| Flange Inside Diameter | 2¾ in (69.9 mm, converted from K&N title) |
Measure the intake connection and installation space before ordering. Universal does not mean a direct fit for every vehicle. Vehicle-specific pipework and adapters are not included unless stated in the pack contents.
Check K&N’s original specifications ↗
