K&N / UNIVERSAL FILTERS

Measure it.
Make it fit.

K&N RF-1038 Universal Air Filter — 89mm

A oval straight universal filter with washable oiled cotton gauze. Connection: 3.5 in (89 mm). Height: 6 in (152 mm). Match the connection and available installation space before ordering.

Oiled cotton gauzeWashable & reusableDimension-based fitment

£239.99

Includes VAT at 20% · Great Britain delivery included

Availability check required before ordering.

Request availability and the delivery estimate before payment. Your enquiry does not place an order or reserve stock.

Request to order ↗

England, Scotland and Wales only. Northern Ireland, Channel Islands and Isle of Man excluded.

Connection3.5 in (89 mm)
Filter height6 in (152 mm)
Filter mediaOiled cotton gauze

Detail

Product details

A oval straight universal filter with washable oiled cotton gauze. Connection: 3.5 in (89 mm). Height: 6 in (152 mm). Match the connection and available installation space before ordering.

Delivery & ordering

Availability check required before ordering.

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 RF-1038 ↗

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

Currently unavailable to order. Contact us for availability.

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.

Full delivery information ↗

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.

K&N published specifications for RF-1038
Brand / part numberK&N / RF-1038
Air Filter ShapeOval Straight
Height6 in (152 mm)
Package Contents1 Air Filter
WashableYes
Air Filter MaterialCotton Gauze
Flange Inside Diameter3.5 in (89 mm)
Flange Outside Diameter3.5 in (89 mm)
Flange Length0.938 in (24 mm)
Flange TypeCentered
Base Outside Length12 in (305 mm)
Base Outside Width6 in (152 mm)
Top Outside Length9.938 in (252 mm)
Top Outside Width3.938 in (100 mm)
Top StyleCarbon Fiber

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 ↗