X2. Studs threaded all the way to the bottom decrease the chances of stripping out the threads in the manifold.Studs w/ neversieze
ARP is the premier company in automotive fasteners. However, the carb studs are not under a lot of pressure unless you are trying to pull your engine via the intake manifold which I personally would never do. Companies make carb studs that are about 1/3 the price or less and some like Mr. Gasket or Spectre have a hex top that makes installing the stud much easier. I've also seen studs with an allen head for installing.
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