I'll pass basic ZX3 info to you. The SVT struts/shocks aren't *that* much better than the "normal" ones. I toasted my stock ZX3 struts with H & R Sport Springs in a few thousand miles. With the racings springs, I would guess your SVT stuff would last about as long. Take it easy, you might get 10-15 thousand out of them. Have fun, I'll bet they're toast in 5-10 thousand.
i agree with phillip just a little bit....I have the svt struts with a progress 1.8 drop and I drive it HARD...LIKE really hard, always racing....1/4 and road course "style". I have had them for about 10k now and NO problems. Just some clunking in the back, but i don't care about that
hard to really judge by mine though. the speaker box inthe back weighs a ton. it's 4cuFt of MDF with 2 JL15's in it. plus the 2 amps. makes the car sit a little even instead of higher in the back. if you want to see more pics got o http://www.idversusego.com and click the "my car" link