I just wrote Adrian a mini review of the K&N install I did so here it is for all to read:
The sound is great at full tilt. But it ain't audible when you're just cruising around. The K&N will burn more fuel now. I don't mind this so much.
I find that my exhaust has quietened down a little since installing the K&N. Even at idle. Strange.
I feel that the cold air intake I had in it earlier had more power over 1st and 2nd gears. Felt like there was more even power, or more even powerband than the K&N. Although with the K&N, once it gets past about 5000 it just wants to zoom up to 7000. Scary stuff. With the older intake it liked to hold it at 6000. So I suppose this is when the K&N is really sucking in air.
I drove it hard today and when I got back home I popped the bonnet to inspect the K&N. The rubber pipe which leads to the radiator gets very hot. It's next to the rubber intake pipe which leads straight to the engine. This pipe gets pretty hot too. And of-course my engine bay was super hot so I suppose the K&N is definitely sucking in warm air. It's near the road, down low, close to the front left wheel. I have no undertray under there so perhaps this helps with the airflow and keeping the K&N sucking in cool air. Since I have no undertray I was a little worried about the K&N sucking in water on a rainy day. It rained today so I tried this out and the K&N filter did not get wet. It seems high enough to not get wet which is great.
I am investigating now into getting some cold air intake tubing and directing air from the front of the bumper to my K&N.
At revs it definitely louder but in all honesty I can already see myself getting over the sound and wanting even more sound