Yes going from a light ds to another light drive shaft is not worth the cost. Going from a steel ds to a carbon ds is definitely worth it that's why Nissan did it on the 370z. Especially with our low torque v6. To our motors it will be much more important then a big torque v8. Just look at the WHP difference in the g37 and 370z. The only difference is the heavy 2 piece steel ds the g37 comes with. Also just as I said before light is key with our v6 engines so light wheels, light rotors is exceptionally important. The worth of these advantages will vary between person to person.
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