⟲ 360° — drag meThe facts.
| Brand | K&N |
|---|---|
| Part number | KN-138 |
| Filter type | Spin-on racing oil filter |
| Hex size | 17 mm |
| Filter medium | Synthetic |
| Safety-wire port | Yes — drilled through hex |
| O-ring | Pre-lubricated, double-rolled seal |
| Fitment | Suzuki GSX-R 1000 (2003–2023) |
DescriptionThe whole story▼
When every lap demands reliable oil pressure and clean lubrication, the K&N KN-138 racing oil filter delivers where it counts. Purpose-built to withstand the extreme oil pressures, sustained high revs and intense thermal cycles of track use, this filter is the go-to upgrade for GSX-R 1000 owners who demand more than standard fitment.
Key Features
- 17 mm hex fitting allows fast, tool-box-standard installation and removal — no specialist tools required.
- Safety-wire drilling through the hex enables mandatory wire-locking for circuit scrutineering, adding peace of mind on road or track alike.
- Housing walls are 50% thicker than conventional filters, giving the KN-138 the structural rigidity to cope with racing oil pressures and thermal shock.
- Reinforced baseplate with a double-rolled sealing edge locks the filter body together under sustained stress, preventing bypass or blowout.
- Synthetic filter media provides maximum filtration efficiency, stripping contaminants from the oil before they reach critical engine components.
- Pre-lubricated O-ring ensures a clean, leak-free seal from the moment of installation — critical during a quick service between sessions.
- Uprated pressure-relief valve guards against filter over-pressurisation, keeping oil flowing to the engine even under worst-case cold-start or racing conditions.
- Fully compatible with modern synthetic engine oils and racing-grade lubricants.
Built for the Racetrack, Ready for the Road
The KN-138 is engineered to exceed the original equipment specification for the Suzuki GSX-R 1000 across the entire 2003–2023 production run. The reinforced canister construction and high-flow synthetic filter medium mean oil delivery remains consistent whether you are exiting a fast chicane at maximum rpm or commuting on the public road. The safety-wire port is not a marketing detail — it is there for riders who run their machine under racing regulations and cannot afford a filter backing off mid-session.
Filtration Performance
K&N's synthetic filter medium is selected for its combination of high dirt-holding capacity and low restriction. Maintaining strong oil flow at elevated temperatures and engine speeds ensures bearing surfaces, the crankshaft and the valve train receive uninterrupted lubrication even during hard acceleration and sustained high-speed running. The updated pressure-relief valve calibration is a measurable improvement over earlier K&N generations, providing an additional layer of protection during cold starts when oil viscosity is at its highest.
Fitment & Compatibility
The K&N KN-138 oil filter is a direct replacement for the following models:
- Suzuki GSX-R 1000 — all variants, 2003 to 2023
Specifications
- Part number: KN-138
- Brand: K&N
- Filter type: Spin-on racing oil filter
- Hex size: 17 mm
- Housing wall thickness: 50% thicker than standard
- Filter medium: Synthetic
- Safety-wire port: Yes — drilled through hex
- O-ring: Pre-lubricated, double-rolled seal
- Fitment: Suzuki GSX-R 1000 (2003–2023)
FitmentWhich bikes this fits▼
- Suzuki GSX-R 1000 (2003–2023)
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.