I need to know how to raise the flow on this faucet. I had a kitchen remodel and the granite people picked the sink and faucet. I just approved the look. I need to know if there's a part I can buy or take out to improve the flow rate. It is extremely slow.

Is there an aerator on your particular model? If so, you could try upsizing to a higher flow aerator.

For the most part, the days of removing a flow restrictor are gone. The tiny ports in the valve body are usually the restriction now.

Poor house pressure, will not improve any brand of faucet. What is the normal water pressure to your house and what is the pressure when you use the kitchen and bathroom faucets at the same time??
Best Wishes

Make sure the faucet hot and cold water shutoff valves below the sink are turned all the way ON. The remodel person may have turned them OFF to do the work and later he only turned them on slightly. As mentioned, remove the aerator from the end of the faucet spout, see if the flow stays the same or increases. If it increases to normal then look into getting a different aerator. If you continue to have problems then call the remodel person and ask about the problem, even the low-flow faucets should be usable.