Stealth 993

It's US M030, so it doesn't lower the car, you can thank the US GOV for that one.

Here are the specs, from Porsche web page circa 1996.
You get ABD/LSD, M030 suspension, turbo hydraulic assisted brakes, & a lot have Litronic headlamps.

http://web.archive.org/web/199701291....com/DrM4.html

M Fig

What is the purpose of the US M030? Is it stiffer than normal springs? I actually really like my cars ride...but want it lower. I've been planning on getting M033 because I didn't want it too firm...but from what you are saying, it sound like I have M030 now...maybe I should go with that again?

Stealth 993

Different shocks & springs. Yes, they are stiffer. Actually the US M030 springs are linear vs the progressive ROW ones. US ones are a bit stiffer.

M033 will be softer then what you have. ROW M030 will ride a little smoother then US M030.