Sprint Filter P08 F1-85 Air Filter for Racing – Aprilia RS660 (2021–2026) R176S F1-85

The Sprint Filter catalogue holds more than one racing-grade listing for the Aprilia RS660, and this is the R-series one: R176S F1-85. The distinction is not decorative. The other racing entry is drawn against a housing the RS660 shares with the Tuono 660 and is listed for both machines; this number is specified against the RS660 alone. Two entries, one motorcycle, and a name that cannot separate them — which makes the part number, not the model, the thing to order by and the thing to check against the panel that comes out.

Key Features

• Racing-grade dry polyester with filtration rated at 85 µm
• Rated throughput of 15,000 l/m²/sec, the open end of the Sprint Filter media range
• Dry in every state — nothing to oil on delivery, nothing to re-oil after cleaning
• Roughly twice the filtering area of a typical performance element
• Sits in the series airbox in the factory panel position, with no cutting and no remap
• Regenerated and refitted rather than replaced, with two years of warranty from purchase

Two numbers, one motorcycle

Where a catalogue keeps two entries apart, the safe assumption is that they are not interchangeable, and the safe procedure is short: read the marking on the element currently in the airbox, note the model year from the registration document, and match both against the listing before ordering. If a previous Sprint Filter panel is in the bike, its own number settles the question outright. This is the part of buying a filter that no specification table can do for you, and it takes about two minutes with the seat off.

What the racing weave actually changes

An open cloth passes more air and holds back less of the fine fraction than the standard grade — one exchange, run in the direction of throughput. By Sprint Filter's own account this material lies behind the air filters most used in MotoGP, Moto3, World Superbike, Supersport and Superstock, a statement from the manufacturer about deployment rather than an independent test. What it does not do is add power. An element inside an unaltered airbox leaves a series RS660 producing what it was certified to produce; the reliable gain is a very low intake resistance and a panel that a cleaning returns to its original condition.

Care and cleaning

Compressed air from the clean side outward is the standard service between sessions, and it suits an open weave particularly well. Where a wet or oily paddock has left more behind, wash the panel in lukewarm water with a mild detergent, rinse it thoroughly and let it dry completely in circulating air. Never apply heat, a hot air gun or a flame to speed that up, and never treat the cloth with oil. The Downloads tab carries the maintenance sheet.

Fitment & Compatibility

Specified for the Aprilia RS660 in model years 2021 to 2026. This part number is drawn against that single machine, and the Fitment tab shows it with its model years.