How do you get the whammy to sound like it does in the song CRITICAL ACCLAIM by a7x?

I have a silverstone guitar(the white and black cheap one) and i need to know how to make the whammy sound like synyster gates does in the song Crittical acclaim, how do i make that screatching niose? do i need a certain guitar? guitar pedal? if so how much and what kind of pedal?