It already aired and it won't be on DVD for a while so either look for it online or catch a rerun.
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For naruto shippuden its on episode 107
It's already come out you can watch it on narutoget.com. Whoever asked this question probably asked it along time ago because the newest thing in Naruto right now is Naruto Shippuden episode 160 which is coming out this Thursay. Can't wait^_^
You can watch all Naruto episodes on narutoget.com
English dub I am using means that it has Japanese language with English subtitles. If so, then go to Hulu.com and it has every single Naruto-Naruto Shippuden episode ever made with a new one ever Thursday.
If you mean when is naruto shippuden episode 167 going to be in english dub then you are looking at around april 2013 :)