What duo  was an American rapper and record producer apart of , who had a guest appearance in  the second album by American hip hop duo 1982 ?
Havoc (musician) Kejuan Muchita (born May 21, 1974), better known by his stage name Havoc, is an American rapper and record producer. He was one half of the hip-hop duo Mobb Deep.
Ant (producer) Anthony Davis (born September 6, 1970), better known by his stage name Ant, is an American hip hop producer. He is best known as being one half of the hip hop group Atmosphere, but has worked with many other artists and projects, mostly with Rhymesayers Entertainment, such as Brother Ali, I Self Devine, Felt and The Dynospectrum. He has also released two solo albums, Melodies and Memories, and Melodies and Memories 85–89.