So are you saying I need to get the ASP Underdrive pulley before I get the Hks alc? I'm not satisfied with the shift timing. That's why I was thinkin about getting a hks alc; just to make it more smooth.

What does that underdrive pulley do anyways? That thing is not that expensive so I might get it if it's worth it. Like would it fix my problem. Does it have anything to do with the gear shifting or performance?