The facts.
DescriptionThe whole story▼
Almost everything an owner adds to a Katana can be seen. That is half the point of the motorcycle, and it makes the airbox the odd one out: the air filter is the one change that leaves the outside of this machine exactly as Suzuki drew it. Nothing shows, nobody asks, and the purchase has to stand on what it does rather than how it looks. Held to that standard, the racing version of this element — the P08 F1-85 — has a narrower case than its name suggests.
Key Features
- The racing weave of the P08 family: dry polyester from threads of 22 µm diameter upwards, no oil at any point
- Flow of 15,000 litres per square metre per second, where the road P08 moves 5,050
- A large filtering surface, about twice the media of a typical performance filter
- Swapped in for the original element; bodywork, ducting and mapping stay as delivered
- Cleaned with compressed air and used again, season after season
- Two years of Sprint Filter cover from the purchase date
The one change that does not show
Under the tank this Katana is the GSX-S 1000 of 2016 to 2021: the same intake, the same element, which is why one part number serves both. The decision loses everything a Katana purchase usually turns on: no line, no finish, no sound. There is a weave, a flow figure and a price. And plainly: a drop-in filter does not make a standard motorcycle noticeably stronger, whichever medium it is cut from. What it can do is hold the intake's share of the resistance low and steady between services, and stop being a part bought again every year.
Where 15,000 litres would have to be used
The gap between the two media is flow: 15,000 litres per square metre per second against 5,050, from a different, patented weave rather than a wider one — the 85 belongs to the name, not to a pore size. That capacity exists near the top of the rev range at full throttle and nowhere else, and it is not free: the F1-85 costs about two and a half times the P08 here. What it does not cost is retention: Sprint Filter measures 95.22 per cent of 100-micron particles held against 93.13 for the P08, the only particle size the maker quotes. If the Katana sees track days and spends real time at full throttle, the price is fair. Ridden on chosen Sundays and serviced by the book, the standard P08 is the more honest purchase — and dusty routes argue for finer media, P037 at 37 microns or P14 at 14: each holds more back and flows less. Finer is not better, only aimed elsewhere.
Care and cleaning
Compressed air is the routine: aim it at the clean face of the PM91S F1-85 and push outwards until the weave is open. A wash in lukewarm water with a mild detergent handles the rest; rinse it clear, then dry it fully in open air, with no heat gun and no flame near it, and refit it dry. The maintenance sheet sits in the Downloads tab.
Fitment & Compatibility
For the Suzuki Katana of 2019 to 2022, seated in the standard airbox with nothing else altered. This racing element covers two machines, the Katana and the GSX-S 1000 of 2016 to 2021; the 2022-onwards Katana takes a different one.
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
- Suzuki GSX-S 1000 (2016–2021)
- Suzuki Katana (2019–2022)
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.