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I'm going to be swapping s5 rotors into my block as some of you already know. When i do this, am i going to need new balances? (to make up for the weight difference of the rotors) I'm also getting an s5 intake manifold. Other than porting the IM what else will need to be done? I would use the throttle body as well from this IM, i'm assuming there's some way to rig up the omp lever to it? what else will be involved besides what i've stated?