The K&N Air Filter Element (K&N P/N 33-2284), for the 2004-2011 RX-8 application interchanges exactly with the stock paper element. The filter is constructed with cotton gauze material sandwiched between fine wire screening. This beautifully crafted filter is pre-oiled and ready for installation. This K&N filter comes with a Million Mile Warranty, and is certified to be street legal. K&N has done an outstanding job of supplying fully detailed instructions, a service record decal, and a warranty/registration card.
By using the K&N Recharger Kit, the filter can be cleaned, re-oiled, and reused almost indefinitely. This K&N Air Filter Element provides better air flow when dirty than either the stock paper element or the Foam Air Filter Element.