I ordered these from a recommendation from the HondaShadow.net forums, and I'm certainly glad that I did. The Shadow tended to be a bear on cold starts, but since installing these jets and the needle valve shim, it starts right up. There's no more coughing or sputtering, and I can be on my way in two minutes, just enough time to gear up! I'll definitely order another set if I make any modifications to my setup, and the calculator takes all the guess work out of it. Definitely recommended.