Board Thread:Naruto Discussions/@comment-25531508-20140921150550/@comment-25349026-20140924213337

High Definition420 wrote: Without Kurama Naruto would be dead when he fought with Sasuke at the valley of the end. Kurama is one big powerup so is Sharingan.

Without, Kurama, Sasuke and Naruto would have both been dead long before that. Namely, during the first arc at the battle with Haku.