If accuracy of your valve train is important Billet is a good way to way to provide it.
A billet cam is made from a differant material than a SADI cam. The cam lobes are also tighter in tolerance.
To me, spending good money on a strong bottom end, good flowing heads, intake, carb, ignition etc and then skimp a few bucks on the cam just seems out of place.
I don't think trying to eliminate stacking tolerances is "creative marketing"
It's been around since the industrial revolution*
*edit* since man has been measuring things...lol
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