Bun B and Pimp C are two of Texas rap's biggest names. When they blessed the beat together as UGK, they were unstoppable.

Formed in 1987, the Underground Kings released six LPs of original music along with many more EPs, mixtapes, and big-time features, including spots on Jay Z's "Big Pimpin'" and Three 6 Mafia's "Sippin' on Some Syrup." 

Pimp C was incarcerated in 2002, which halted the duo's output until 2005 when he was released. They put out Underground Kingz in 2007, their most commercially successful release. Pimp C tragically passed just a few months after the release of that record, but left behind enough material for Bun B and company to piece together UGK 4 Life in 2009. 

Today we're throwin' it back to one of Texas' greatest contributions to rap music: UGK. From the old school sounds, to the features, to the later stuff, there is no shortage of fire material from these dudes. It was hard to limit the list to 10, but we went for variety to give you an idea of the duo's depth.