Them Firewater Boyz Vol. 1 featured Chad Butler who was a founding member of which group?
Them Firewater Boyz, Vol. 1: Them Firewater Boyz Vol. Them Firewater Boyz, Vol. 1:  The album features guest appearances from fellow American rappers such as Pimp C, Fiend, Devin the Dude, Kamikaze (of the Crooked Lettaz), Bone Crusher, Polow (now Polow da Don), Young Bleed and Noreaga, among others. Pimp C: Chad Lamont Butler (December 29, 1973 – December 4, 2007), better known by his stage name Pimp C, was an American rapper and recording artist. Pimp C:  He was best known for his work with Bun B as a founding member of the Underground Kingz (UGK).
Underground Kingz