I need an effect but don't know the name for it, it could be just heavy distortion, anyway, i'll give some examples of the effect i'm trying to get:

First guitar sound in Papa Roach - Last Resort.
First sound in Limp Bizkit - Break Stuff.
First Guitar sound in Alien Antfarm - Smooth Criminal.

I hope that is enough to demonstrate the kind of effect I need, (perhaps those three are different from each other.?..).

Could you please tell me the name of that effect, and what to buy to achieve it (which pedal or whatever).

Thanks