I seem to have a hard time finding very spicy beef noodle soup in SGV (admittedly I've not tried a lot of places). Kingburg Kitchen seems to have the hottest version I've found so far. JTLY has great noodles and great beef, but no matter what I say, the broth is just not hot enough. Dean Sin World also had kind of bland broth.
So, where can I get really spicy beef noodle soup?
715 W Las Tunas Dr, San Gabriel, CA 91776
Dean Sin World
306 N Garfield Ave # 2, Monterey Park, CA