Sprint Filter P08 Air Filter for Road & Track – Honda CB1000 Hornet / Hornet SP (2025–2026) PM158S

The CB1000 Hornet arrived for 2025, and almost everything on a motorcycle that new has to wait. The machine reaches showrooms first, the parts that fit it follow a season or two later, and early owners spend that gap being told the item is still in development. The intake is the exception, because it is not new. Honda built the Hornet around the engine and airbox of the CBR1000RR, retuned for the road rather than redrawn, so the most thoroughly proven part of a brand-new naked is the box the air comes through. The element that fits it has been on the shelf since 2017.

Key Features

• Woven polyester, a single dry layer, never oiled — nothing in the medium can travel downstream onto the sensors
• 80 µm filtration at 5,050 l/m²/sec, the P08 being Sprint Filter's road and track medium
• Polyester thread from ø 22 microns; the 80 µm figure is the aperture of the weave, not the fibre
• Roughly twice the working cloth of a typical performance filter, folded into the standard housing
• Sits where the paper panel sat — no airbox modification, no remap, nothing to declare
• Cleaned and refitted instead of replaced, specified for the life of the motorcycle, two-year guarantee

An intake that is not first-year

Buying into a new model means accepting a period of not knowing. Service intervals are printed, but nobody has ridden far enough to test them. That uncertainty is real on the Hornet, and it stops at the airbox. Housing and element were specified for a litre superbike years earlier, so fitment, availability and supply were settled before this motorcycle existed. For the owner of a 2025 machine that is an unusual position: the part is not a bet on an aftermarket catching up.

One element for Hornet and SP

The SP badge buys suspension, brakes and a quickshifter. Not one item on that list sits upstream of the filter, so both versions take a single part number. It is worth being plain about what changes when it goes in: an insert filter does not make a standard motorcycle noticeably more powerful. What it does is hold intake restriction lower and, more usefully, hold it steady between services, because a woven element is returned to its starting condition by cleaning rather than drifting one way until it is binned.

Care and cleaning

Most of the time the PM158S needs nothing but compressed air, held against the clean face and blown outward so the dirt leaves the way it came in. After a wet or gritty spell, wash it in lukewarm water with a mild washing-up detergent and rinse until the water runs clear. Then let it dry in open air: no heat gun, no radiator, no flame near it, because the medium is polyester and heat is what ruins it. It goes back in dry and untreated. The maintenance sheet sits in the Downloads tab.

Fitment & Compatibility

Cut for the airbox of the Honda CB1000 Hornet and Hornet SP built from 2025 to 2026. The element covers two machines in total, the other being the CBR1000RR of 2017 to 2026, which supplied the housing. Both are in the Fitment tab.