Below you can find the websites where you can download the Naruto episodes in high quality. Be sure you got the DivX codec just like the online episodes.
The official site of the Naruto fan-subbing group Dattebayo. Dattebayo dropped the project after Naruto Shippuden Episode 091, however you can still download the previous episodes.
Great site which has Anime and Naruto RAW episodes available to download by using your favorite bittorrent client.
A very promising Naruto fan-subbing group. They also release in HD-quality.
Yes, we also create our own torrent files. Lately we also started to make our own subs.