| A*N*I*M*A*L |
| Christian plays stand-up bass on one song on this Argentinian band's debut CD |
| Apartment 26 |
| "Hallucinating", the debut full-length LP by Apartment 26, Burton C. Bell did vocals on "Slicedbeats". Official site |
| Biohazard |
| Christian plays stand-up bass on a track on the New World Disorder album. Official site |
| Brujeria |
| Dino and Raymond are members of this band. Official site |
| Clay People |
| Burton contributed backing vocals to the tracks Lethargic, We Are All Sick, and Spit on the "Iron Icon" CD. Official site |
| Cypress Hill |
| Christian and Dino are in the song Get Out Of My Head and Christian is in the song Dust on the Skull & Bones album. Official site |
| Factoria De Miedo |
| This is Fear Factory in Spanish. They released one song, Sangre De Ninos, under this name on the "Cry Now, Cry Later" compilation album. It was the only recorded FF song that Andrew Shives actually played bass on. |
| G//Z/R |
| Burton was the singer in this band with Geezer Butler from Black Sabbath. He was on their first album. G//Z/R now have a different singer. Fan Site See Pics |
| Hate Factory |
| On their first Australian tour, Raymond and Dino jammed with two members of a support band, Christbait, and the sound man recorded the result. Two pieces of music were released on the Sounds Of Ordinary Madness compilation in Australia. |
| Infinity |
| Christian plays stand-up bass on the track Bad Devil on the album from Devin Townsend's Infinity project. Fan Site |
| Junkie XL |
| Dino played all the guitar parts on Junkie XL's debut album, 'Saturday Teenage Kick'. Official Site |
| Kilgore |
| Burton does vocals on the track TK-421 from "A Search For Reason". Fan Site |
| Kush |
| A super group of sorts featuring Deftones guitarist Stef, Cypress Hill frontman B-Real, Fear Factory drummer Raymond Herrera and Christian himself. |
| Kill II This |
| Burton C. Bell does guest vocals on the new Kill II This album 'Trinity'. He'll appear on the tracks '2 Tribes' (a 'Franky Goes To Hollywood' cover) and 'Figure of Eight'. Official Site |
| Limp Bizkit |
| Dino and Christian make a guest appearance on the track Indigo Flow from the 'Three Dollar Bill Y'all' album. Official Site |
| Nailbomb |
| Dino plays guitar on the song '24 Hour Bullshit' on their Point Blank album. Info Site |
| Phobia |
| Raymond plays drums on the first four tracks from Phobia's 1994 EP Return to Desolation. Official Site |
| Soulfly |
| Burton, Christian and Dino appear on Soulfly's debut self-titled album. Burton and Dino on Eye for an Eye and Christian plays stand-up bass on Bumba and No. Official Site |
| Spineshank |
| Burton does vocals on the track 'Stain (Start The Machine)'. Official Site |
| Static X |
| Burton does guest vocals on the Ministry cover of Burning Inside on the Crow 3 soundtrack. Official Site |
| Strife |
| Dino does back-up vocals on the "In This Defiance" album Swollen Members Christian plays stand-up and normal bass on one song. Records Label's Site |
| Tricky and Muggs |
| Christian has contributed some stand-up bass to the as yet un-named collaboration between Muggs from Cypress Hill, and Tricky. |