The facts.
DescriptionThe whole story▼
Every Roadmaster on this code was built in 2025 or 2026, so most of them are still young enough for their owners to ask the first question anyone asks about an intake part on a new motorcycle: what does it do to the warranty? The answer depends on what the part changes. PM237S changes the material inside the airbox and nothing else. Same housing, same seal, same sensors, no remap and nothing cut or drilled. Take it out, refit the original paper panel, and the motorcycle is back in its series state. That is a narrower change than most accessories fitted to a full-dress tourer, and it is entirely reversible.
Key Features
- Single dry layer of woven polyester, 80 µm filtration, 5,050 l/m²/sec of rated flow
- Fibres from 22 µm in diameter, with the openings set by the weave
- Holds back 93.13 % of 100-micron particles; four-layer oiled cotton manages 76.42 %
- About double the filtering surface of other performance filters
- Direct replacement in the standard airbox, nothing modified and no fuelling change
- Cleaned and reused rather than replaced, two years of warranty on the element
Two warranties, kept apart
Sprint Filter backs the element with two years of warranty from the date of purchase and designs it to last the life of the motorcycle with regular cleaning. Both statements describe the filter. They say nothing about Indian's terms for the motorcycle, and this page cannot speak for them; ask the dealer if in doubt. The sensible routine is simple: keep the original panel, bagged and labelled with the date it came out, and keep the receipt for this one. If anyone needs to see the series state, it can be shown.
What it does on a Roadmaster
A drop-in element does not make a standard Roadmaster noticeably stronger, and no honest description promises that. What it gives is an intake restriction that starts low and is put back there at each cleaning, instead of rising until a paper panel is bought again. It is not the only medium listed for this machine. Where a Roadmaster regularly travels dusty roads, the P14 nonwoven catalogued for it filters finer at 14 µm and passes less air. On clean tarmac that trade buys nothing, and the woven panel on this page is the better fit.
Care and cleaning
Routine service for PM237S is compressed air, held to the clean face and worked outwards across the whole panel. If air leaves a stubborn deposit, wash it in lukewarm water with a mild detergent and rinse until the water is clear. Dry it in moving air at room temperature, never with heat or a flame, and fit it back dry without any treatment. The maintenance sheet sits in the Downloads tab.
Fitment & Compatibility
Catalogued for the Indian Roadmaster of 2025–2026 in the untouched series airbox. The same code serves six machines in total: the Roadmaster and Chieftain from 2025, the Pursuit from 2022, and the three Challenger versions, standard, Dark Horse and Limited, from 2020. Check your year in the Fitment tab.
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
- Indian Challenger (2020–2026)
- Indian Challenger Dark Horse (2020–2026)
- Indian Challenger Limited (2020–2026)
- Indian Chieftain (2025–2026)
- Indian Pursuit (2022–2026)
- Indian Roadmaster (2025–2026)
- Indian Challenger 1890 (2020–2026) · own page →
- Indian Challenger Dark Horse 1890 (2020–2026) · own page →
- Indian Challenger Limited 1890 (2020–2026) · own page →
- Indian Pursuit (2022–2023) · own page →
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