Swaybar upgrade question

[mikesz]

Hi All, I have a 99 Boxster, I live in the USA. I want to upgrade my suspension. Does anyone know the existing swaybar specs on the 99 base? I have a Tip transmission. Based on what I have found on the CB Racing info the front swaybar on my car is a 23.1mm front diameter. So installing the eibach 26mm front part 70779 would be a big improvement along with tarret drop links, bilstein HD shocks and eibach lowering springs.

Based on the CB racing info my car has an 18.5mm rear sway bar but then it goes on to say that "On the Boxster the anti sway bars are the same from USA to ROW.
The tiptronic cars already have 030 bars in the rear." So that would mean I have a 19.6mm rear swaybar? I ask this because I have a rear swaybar part 98633370113 and don't want to swap out the rear if its not an upgrade. Could someone please clarify for me what size sway bars I have on my car currently?