i have a 2000 ssei and was wondering what 3.5 pulley to put on. i dont know if i need a press on or what. please send me the right way.

If your not planning to change it again, then a 3.5" press on is fine. But if you think you might be doing more modding then I suggest spending a bit more and get a MPS. You will also need a pulley puller or someone near by with one to change it.