Register a free account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!
Cotton filters are proven to be the least restrictive...but maybe they're not so good at stopping impurities from entering the engine. The K&N is cotton whilst the ITG is foam.
There was another one somewhere with graphs, but I can't find it now.
Having said that, I've currently got a K&N and removal of acoustic valve and there's no noticeable power gains. However, on my previous 182 I did notice the engine was a bit livlier with an ITG filter...
I think there's very little in it but seems on this site most prefer ITG, maybe because of the company's racing pedigree??