[ZL1with1LE]

Hey everyone, I just got my car tuned by Matt Sorian here in Houston TX. I went with a very basic beginner set up, Rotofab & DSX flex fuel sensor on an E60 mix. I'm very happy with the car for now, but I'm already starting to look at what I'm going to do next year.

Next round of mods will be Mighty Mouse Wild Catch Can, Cordes Expansion Tank, Weapon X-Heat exchangers, headers, and potentially upgrading a pulley. Here's where I'm running into an issue.

I see people recommend lower pulley, but what all supporting mods do I need? Damper, pulley itself, lower ring. There's hundreds of things and I have absolutely 0 idea what I'm looking at. What all do I need to upgrade the lower, and what do you guys recommend? I've looked on the forums but I can't make sense of what all exactly I need. Not looking for crazy power, just want to reliably liven the car up a bit. Thanks guys.