6 round battle?! Most rappers nowadays can't even put together a hot 16!

Before Eminem sold over 42 million tracks and 49 million records the emcee was rap battling to prove his name carried some weight in Detroit.

In this rare footage Eminem goes 6 ROUNDS with Juice (another Detroit emcee) in a battle that is not only rare, but goes down as the kick start to Em being a household name.

If you listen closely you can hear some famous lines in this battle that were later used in some of Em's songs.