Fear Factory is one of Machine Head 's influences .
The band is influenced by Californian thrash metal bands such as Exodus , Slayer and Testament , crossover thrash bands Suicidal Tendencies and Cro-Mags , groove metal bands Pantera , Exhorder , and Fear Factory , and grunge bands Nirvana , Soundgarden and Alice in Chains .
Machine Head -LRB-band-RRB-