⟲ 360° — drag meThe facts.
| Brand | K&N |
|---|---|
| Part Number | KN-138 |
| Type | Racing oil filter |
| Hex Size | 17 mm |
| Filter Medium | Synthetic |
| Housing Wall Thickness | 50% thicker than standard |
| Base Plate | Reinforced with double-rolled seam seal |
| Wire-Lock Drilling | Yes — integrated into hex |
| Fitment | Aprilia RSV4 / RSV4 1100 Factory / R / RR / RF (2009–2020) |
DescriptionThe whole story▼
Engineered for the demands of the track and built to survive the RSV4's screaming V4, the K&N KN-138 racing oil filter is the choice of riders who refuse to compromise on engine protection. Reinforced housing walls 50% thicker than standard, a wire-lock drilling machined into the 17 mm hex, and a synthetic filter medium capable of handling peak oil pressures make this the definitive service upgrade for Aprilia RSV4 owners chasing lap times or simply expecting more from their road machine.
Key Features
- 17 mm hex fitting allows installation and removal with standard hand tools — no filter wrench required, even in tight engine bays.
- Wire-lock drilling through the hex satisfies scrutineering requirements at circuits where safety wire is mandatory.
- Housing walls reinforced to 50% greater thickness than OEM-style filters, resisting deformation under extreme oil pressure and thermal cycling.
- Reinforced base plate with a double-rolled seam seal eliminates the risk of blow-off during high-revving track use.
- Pre-lubricated O-ring speeds up oil changes and ensures a leak-free, torque-correct seal every time.
- Synthetic filter medium delivers maximum filtration efficiency, removing contaminants without restricting flow at high rpm.
- Integrated pressure relief valve protects the lubrication circuit from over-pressure events, maintaining consistent oil delivery.
Built for the Track, Proven on the Road
The RSV4 platform — whether the base R, the track-focused RR, the semi-active RF or the 1100 Factory — places extraordinary demands on every service component. K&N designed the KN-138 specifically for these conditions: sustained high rpm, elevated operating temperatures, and the stop-start thermal stress of a trackday. The synthetic media maintains its filtration characteristics where paper elements can degrade, and the reinforced canister holds its geometry where lesser filters distort.
The wire-lock drilling is not merely a convenience feature — on many circuits it is a technical requirement. Having a filter that arrives ready for safety wire means one less obstacle between you and the pit lane exit. The pre-lubricated O-ring similarly reduces the margin for error during a hurried service interval, giving a clean, consistent seal without additional preparation.
Compatibility with Synthetic Oils and Race Fuel
The KN-138 is fully compatible with modern fully-synthetic engine oils and racing lubricant formulations. Whether the RSV4 is running road-legal synthetic or a dedicated race-spec oil, the filter medium and seals are formulated to perform without degradation, making this an equally strong choice for year-round road riding and intensive track programmes.
Fitment & Compatibility
The K&N KN-138 oil filter is a direct fitment for the following Aprilia models:
- Aprilia RSV4 R — 2009 to 2015
- Aprilia RSV4 RR — 2015 to 2020
- Aprilia RSV4 RF — 2015 to 2020
- Aprilia RSV4 1100 Factory — 2019 to 2020
Specifications
| Brand | K&N |
|---|---|
| Part Number | KN-138 |
| Type | Racing oil filter |
| Hex Size | 17 mm |
| Filter Medium | Synthetic |
| Housing Wall Thickness | 50% thicker than standard |
| Base Plate | Reinforced with double-rolled seam seal |
| Wire-Lock Drilling | Yes — integrated into hex |
| Fitment | Aprilia RSV4 / RSV4 1100 Factory / R / RR / RF (2009–2020) |
FitmentWhich bikes this fits▼
- Aprilia RSV4 / RSV4 1100 Factory / R / RR / RF (2009–2020)
Questions, one topic at a time.
Get the real shipping cost for this item to your address — the same rates as checkout.
Choose a destination and hit Estimate — we fetch the live rates for this item.
We’re based in Germany. Standard delivery goes by DHL and national postal services and takes about 2–5 days within Germany, 1–2 weeks within the EU and 2–6 weeks outside the EU. Need it sooner? Express delivery reaches most of the world within a few days — just choose it at checkout where available.
Your exact shipping cost is calculated by destination and weight and shown at checkout before you pay — no hidden fees. Express delivery is selectable at checkout where available.
Yes, we ship to over 130 countries. Prices, taxes and delivery times for your destination are calculated automatically at checkout.
Within the EU, no — our prices already include all duties and EU VAT. For deliveries outside the EU (e.g. Switzerland, the UK or the USA), your order may be subject to import duties and taxes set by your country. These are collected by the carrier when your parcel arrives, aren’t included in our prices, and are outside our control.
As soon as your parcel ships we email you a tracking link, so you can follow it all the way to your door.
On out-of-stock items you can request a delivery time or leave your email to be notified the moment it returns — just use the notification box on the product.
You have the right to cancel within 14 days of receiving your order. Register your return by email first; once it’s approved you have a further 14 days to send the goods back. Items should be unused and in their original packaging.
Register your return by email with your order number before sending anything back, and we’ll send you the return instructions. Please note: returns that aren’t registered in advance can’t be accepted.
The quickest way is to place a new order for the size you need and register a return for the original by email — just let us know it’s an exchange.
We’re sorry — that shouldn’t happen. Contact us with your order number and a photo as soon as you can, and we’ll arrange a replacement or refund right away. Faulty goods are always covered by your statutory warranty.
Refunds go back to your original payment method, usually within 3–5 working days of your return reaching our warehouse.
PayPal, all major credit and debit cards (Visa, Mastercard, American Express), Klarna (pay later and instalments), Apple Pay, Google Pay and more — all processed securely via PayPal and Mollie.
Yes. Choose Klarna at checkout to split your purchase into flexible monthly installments.
Your payment is taken when you place your order. If you choose Klarna, you pay later according to Klarna’s terms.
Every payment runs over an SSL-encrypted connection through certified providers. We never see or store your full card details.
If your order hasn’t shipped yet, contact us as soon as possible and we’ll do our best to change or cancel it.
No — you can check out as a guest. An account simply lets you track orders and reorder faster.
For customers in the EU, prices are shown including your country’s local VAT. For customers outside the EU, prices are shown without VAT — instead, your country’s import taxes and duties may apply on delivery (see the customs question).
Yes. Your invoice is attached to your order confirmation email and is also available in your account.
Yes. We’re an authorised dealer, so every product is 100% original and comes with the full manufacturer warranty.
Yes. Everything we sell is genuine and comes with the manufacturer’s warranty, on top of your statutory rights. Keep your invoice as proof of purchase and contact us if you ever need to make a claim — we’ll help you through it.
Our team is happy to help. Use the contact button below and we’ll personally help you choose the right gear or part.
Measure your head circumference about one centimetre above your eyebrows and compare it with the size chart on this page. Between sizes? Choose the smaller one — the padding beds in with use.
Yes — it’s tested and approved to the current ECE 22.06 standard and road-legal across the EU.
Most of our touring and sport helmets are Pinlock-ready and many include the insert. Check the ‘What’s in the box’ section on this page for this model.
Yes — the cheek pads are channelled so the arms of your glasses slide in comfortably.
Take out the washable lining and hand-wash it in lukewarm water. Clean the shell and visor with a soft cloth and water only — never solvents.
Our team will personally help you choose the right gear or part — around 24h for a reply.