Kitchen Faucet

How do you install a kitchen faucet in the thick counter?
I just had a 1 1 / 4 "granite countertops installed in my kitchen. When I went to install the faucet, I realized that the trees that tap water was too short and may not cramp as the tap to attach the meter and supply water. I bought the plastic extension of Home Depot, but those kept leaking. Does anyone know how to solve this problem?
Why spend money in a granite counter top, and use of the old faucet? Back to homodepo and buy the right tap will not regret it, because once you start things like Mickey Mousin never ends.