Get the wheels turning, spin, and wheel off
Snap the axle in half, bust the tie-rod

from Nicki Minaj (Ft. Eminem) – Roman's Revenge Lyrics on Rap Genius

Meaning

Em threatens physical violence to his opponents in the guise of talking about doing really nasty things to the car he’s been metaphorically talking about all verse. For those not mechanically inclined, the definition of an axle is here and the definition of a tie rod is here

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