The facts.
DescriptionThe whole story▼
Most airboxes in this catalogue are simply open to whatever is around them. This one is fed. The fairing takes air in at the nose and ducts it back to the box, so at speed the air arrives with some pressure behind it rather than only the engine's pull. That matters here: a flow rating says how much air passes a square metre of cloth under a given push, and changing the push changes the answer. It does not make a fine medium free; it decides where the cost shows up. The PM158P14 is the fine one in this fitment, 14 µm and 1,800 l/m²/sec against the P08's 80 µm and 5,050.
Key Features
- Dry special nonwoven, never oiled — nothing on the medium can travel into the intake tract behind it
- 14 µm filtration at 1,800 l/m²/sec, the P14 medium, made for dust and long-distance road use
- Between the P08 (80 µm, 5,050 l/m²/sec) and the T12 (7 µm, 560 l/m²/sec): finer retains more, flows less
- About twice the filtering cloth of a typical performance element
- A direct replacement for the paper panel — factory airbox, ducting and mapping untouched
- Washed and refitted rather than consumed, specified for the life of the machine, two-year guarantee
Where a duct helps, and where it does not
In traffic there is no ram effect worth the name, but no serious demand either. Demand peaks at the other end, wide open and high in the rev range — where the duct does most of its work. So the fairing's help arrives roughly when the finer medium would otherwise be felt. Roughly is the honest word: the help is modest, the distance between 1,800 and 5,050 l/m²/sec is not, and a 1,000 cc four near the limiter is one of the few engines that can use it. For track sessions this is the wrong medium in this housing; the P08 at 80 µm is the road and track choice. And no medium adds power: an insert filter does not make a standard motorcycle noticeably stronger.
The duct cuts both ways
An intake facing forward at the nose takes a direct sample of the airstream ahead. An unfaired bike draws from a slower, sheltered pocket behind the steering head; this one is handed the road ahead. On a dry summer road behind farm traffic, on spring tarmac still carrying grit, or over the distances a faired bike covers, that is the case for 14 µm rather than 80. Washed rather than thrown away, the element also returns to the restriction it started at each time, instead of only climbing.
Care and cleaning
Care is compressed air, held on the clean side and blown outward so the dirt leaves the way it came in. When more is left behind than air will shift, wash the PM158P14 in lukewarm water with a mild washing-up detergent and rinse until it runs clear. Dry it in open air only: no heat gun, no radiator, no flame, since heat is what damages the medium. Refit it dry and untreated. The maintenance sheet sits in the Downloads tab.
Fitment & Compatibility
Cut for the airbox of the Honda CBR1000RR built from 2017 to 2026; the 2008 to 2016 machine and the CBR1000RR-R take different elements. Besides this bike, it covers the CB1000 Hornet and Hornet SP and the CB1000F and CB1000GT, all from 2025 to 2026.
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
- Honda CB1000F / CB1000GT (2025–2026)
- Honda CB1000 Hornet / Hornet SP (2025–2026)
- Honda CBR1000RR (2017–2026)
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