i've got my gruppeM CAI on order and it'll arrive within the next couple of weeks.
approx USD$2,800 including 7% tax frieght and installation.
won't be using the K&N filters though cos I was told that they have layer of oil that may "melt" in my local weather and get sucked into the engine. Will post updates on the install and sound.
check out the website http://www.gruppem.co.jp/en/home.html