To make sure it's pulling the right hp? Do you have any reason to think it's not performing as well as it should be--stock? It's cool to get a baseline number and all, but I wouldn't waste the money if it's stock. It gives you something to compare to when you start modding, but you might as well find a tuner and get a tune while you're on the dyno somewhere. They'll give you a baseline pull to see what it does stock, and then you'll have the tune done and see how much improvement you made.