The K&N HA-1008 is a washable, reusable replacement element that swaps in for the paper stock filter on the Honda CBR1000RR. The manufacturer describes a pleated media pack with multiple woven cotton gauze layers, an application-specific base seal, and a pre-oiled element that is ready to ride. Because it is cleaned and re-oiled rather than thrown away, it suits riders who want to stop buying filters at every service interval. Long-tail searches like "2008 CBR1000RR reusable air filter," "cotton gauze Fireblade intake filter," and "CBR1000RR airbox filter upgrade" describe exactly this use.
The case for this filter rests on reusability, filtration, and fit, not on a verified dyno gain. The manufacturer states the filter is designed to provide increased horsepower and torque, but no one has dyno tested the K&N vs OEM on the CBR1000RR that I know of, according to one owner on user forums, and another forum owner says in day to day riding you will NEVER notice a performance bump with aftermarket. Details vary, so confirm expectations with the manufacturer. Do not confuse this with the HA-1008R race version: K&N's HA-1008R racing air filter is for asphalt racing use only. The manufacturer also notes that fuel management modifications will be necessary since this is a race filter.
It is designed to drop into the Honda's factory air box and is held securely in place with a zinc plated retainer frame. There is no cutting or fitting required.
The manufacturer's listing for this part did not address remapping in the research for this description. Owners on user forums who have run K&N elements on the 2008–2011 model report a very slight change in sound, but very very slightly, no need to remap.
Owners on user forums report that when they press the lid down hard, the lid bows up in the center and the lid does not seal correctly. Another owner adds that you shouldn't have to force the lid to get it on. Seat the filter fully before refitting the lid.
Installation is a straightforward filter swap, but access is the time-consuming part. Owners on user forums describing an earlier 2008 CBR1000RR changeover say they pop the seat, pop the shelter, loose the tank and prop it up, then pull the three forward facing wire harnesses before reaching the airbox. Label and photograph connectors before disconnecting them. Once the airbox is open, the manufacturer's method is to install the two stock screws and the two provided washers into the provided air filter plate. Make sure the filter is fully seated before closing the lid, and do not force it shut if it resists.
