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[Aaron Clinton 2,372]

I understand the physics of it, but Casey showed me the Pioneer Death Match winning truck that did deep into the 170's, can someone explain more? I want to understand about them, also when is it benificial to use one and when is it not?

here is the pic of the wall

[Peteyglad 2]

I saw that pic too and am curious of how it works. Looks counterproductive.