You can order the cleaning solution from AEM that you add to water to thoroughly clean the filter.

These are custom made intakes with no fabrication needed

http://www.jcwhitney.com/Air-Intake-Kits-Systems/GP_2005548_N_111+2003+200731141+600010909+4294966690_10114.jcw?showCustom=1

At this time your application is not available

If you are looking to get more air in the motor the intake kit will do that for you. Unless you are upgrading the turbo or making the motor require to need more air with larger cam shafts or the larger turbo system the larger intake manifold will only allow the air to flow better. As the stock motor does not require more air. Jcw does offer a Injen intake for your application as well.

A air Bypass Eliminates the unlikely chance of water ingestion should the filter element become wet from deep puddles, rain, hail, sleet, snow or any other scenario in which the filter element could encounter or become submerged in water.
2.5" Air Bypass Valve ZX479507PF
2.75" Air Bypass Valve ZX479508YF
3.0" Air Bypass Valve ZX479509WF