I don't know about carbon stems and/or bars, but for my lightweight aluminum stems (Syntace and Ritchey WCS), the torque spec is for the stem bolts, not the handlebars. Both of my stems have the torque printed right on the stem, the handlebars do not. If I was installing carbon bars onto those stems, I would not exceed the torque specified for the stem, regardless of the maximum specified for the handlebars.

Does your stem have a torque spec printed on it? It's likely to be a number of "Nm" (newton-meters).

I do know that the torque recommended for installing my carbon seat post (bontrager) is a lot higher than the torque spec for the alloy stems, which leads me to believe the critial link is the threaded part of the stem in the handlebar-stem interface.

Again, take my comments for what they're worth. Try to find the torque spec for your handlebars AND stem. I'd look on the manufacturer's website, but I'd definitely call the shop you purchased the bike from and discuss. You don't want to overtorque any of this stuff: you can strip and ruin expensive stems, or dangerously weaken either the stem or bars.