yes dirtyice mars did do a track with tech. g-dubb produced it and its a sick ass track. tech sent mars the disc with his parts on it and the funny thing is it had all the funny sound effects he adds to his rhymes (you know all the weird shit that makes it sound tight). but it sounded hella funny case it was all those sounds with absolutely no beat,no nothing. hilarious. so to sum it up, SHADOWALKR87, please dont diss a fan for asking a question when you yourself dont really know the answer.
p.s.- i have the track right here in my prettty little hands. and if you dont believe me you can ask mario himself (not that i care if you believe me).