Just picked up one of these recharge kits,

http://www.proaccessories.com.au/KN_Filtercleaning.htm

from Supercheap Autos @ AUD26 yesterday, results are pretty amazing!

The filter is approx 2 years old, a Trust drop in replacement filter for the B18CR. After cleaning the unit, low end throttle response is *much* better, engine idles slightly smoother, low end torque noticibly better too. Havent had a chance to go WOT yet, but the engine sounds like it breathes a lot easier now.

If you guys have a pretty old/dirty filter, with 20 mins to spare and some spare cash, this is well worth the $$$. Highly recommended.