The facts.
DescriptionThe whole story▼
Sprint Filter makes a water-repellent medium, the P037, and it is not catalogued for this airbox. What is offered here runs P08, P14, T12 and the racing F1-85, and none of those is the wet-weather specification. Worth knowing before a first autumn on a 990 Duke, because the answer to rain on this housing is not a different part number. It is that the P08 is dry polyester, which takes water without being altered by it, and which is meant to be washed in the first place.
Key Features
- Dry woven polyester at 80 µm and 5,050 l/m²/sec
- Unaffected by being wetted — washing is part of its ordinary service routine
- Never oiled, so rain cannot thin a coating and carry it downstream
- About double the filtering surface of a typical performance element
- Direct replacement for the standard panel in the series airbox, with no remap
- Built to last the life of the motorcycle; two years of cover from the day of purchase
Water is a material question
Cellulose is the material with the rain problem. A paper panel swells where it is wet, loses shape as it dries and does not come back to where it started, and none of that announces itself from outside the box. Woven polyester has no such reaction: it gets wet, it dries, and it holds the form it was pressed into. That is not a performance claim, it is the reason a washable element is washable at all. It also means a soaked ride is an ordinary event rather than the start of a purchase.
Choosing among the four
Finer weave means more retention and less flow. That is a trade rather than a ladder, and on this housing it runs a long way: the T12 at 7 microns passes 560 l/m²/sec, the P14 at 14 microns passes 1,800, the P08 at 80 passes 5,050, and the racing F1-85 at 85 passes 15,000. The P08 is the middle of that range and the general road answer. None of the four makes a standard 990 Duke quicker — a drop-in element never does that on a standard machine. What changes is where the intake resistance starts and whether it can be put back.
Care and cleaning
Air first: a line held to the clean face and pushed outward returns most elements to service in a few minutes. Where the load is greasy rather than dusty, lukewarm water with a mild detergent will shift it, rinsing until the water leaves clear. The PM175S then dries in open moving air and only there, never over a radiator or near a flame, and goes back in dry and untreated. Sprint Filter's maintenance sheet is in the Downloads tab of this page.
Fitment & Compatibility
The P08 for the KTM 990 Duke, model years 2024 to 2026. Five machines carry this element between them, the 990 Duke among the newest of them, and they qualify through a shared airbox rather than a shared engine. Order by code and by year; the full compatibility list is in the Fitment tab.
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
- KTM Duke / L (2018–2020)
- KTM Duke / L / R (2020–2026)
- KTM Duke (2024–2026)
- KTM Duke R (2024–2026)
- KTM RC R (2026)
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