For most modern cars around rwd 3500 lbs, 450 is fantastic...
For AWD, cars you can go up to 600... i.e M5... but that's highly dependent on weight.
I think a car like the F80 M3 Comp is at the very limit of what can be used to its full extent on a daily... power to weight just works
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2 x N54 -> 1 x N55 -> 1 x S55-> 1 x B58
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