Originally Posted by CJ421
The Performance springs won't lower the car that much. I think cvc is on the money with the spring recommendation since you already have the Performance dampers. The stiffer springs will do more for your handling than the sways by a long shot; sways will help only in turns. Rule of thumb when upgrading a suspension is to address the main issue first and not work around it. Sways count as the latter, aka a band aid for the too-soft stock spring rates.
OP: I didn't want to lower my car either cuz I have to crawl in and out of my garage cuz I scrape the bottom of my bumper if I don't. I installed PS springs to reduce roll, squat and dive and didn't lose any clearance. Maybe 1/2" drop from zsp springs if that..
adding: labor is way more to install that rear sway bar than change springs and bumpstops. LSD swap doesn't require you to drop the rear subframe; rear sway bar does. Just a suggestion. g/l
2007 E90 335i, TiAg, 6AT, ZPP, ZSP, ZCW, 6FL, HD
Quaife lsd, ETS fmic, GIAC s/w, Dinan intake/exhaust/oc, KW/GC/M3/Meyle susp, Apex Arc 8, Mich PSS