ENVE Stem

If you're finishing off a dream build, consider ENVE's Stem as your final, high end touch. Weighing in at just about 125 grams, it's among the lightest stems out there, but its stiffness and rigidity are what really make it one of the best all around. The body of the stem is full carbon fiber, while the faceplate is aluminum, and the hardware titanium. The threads are molded into the stem, rather than having bonded in inserts, to both save weight and make the stem stronger.