Had the car for 2 years now and needed to finish up the suspension upgrade. Last two items on my list were the rear suspension links and full sub frame bushing replacements.
My current mods are:
AST 4100 Coilovers
Swift Springs
Wavetrac LSD
M3 Front wishbone and Tension rod
M3 strut brace (modified for e82)
Dinan camber plates
M3 front sway bar
Powerflex subframe bushing inserts
I know I've been dying for new rear links with all the wheel hop on acceleration. I also wanted to try go full poly subframe bushing instead of the inserts.
I found a killer deal on both
ECS - M3 Upper control arm upgrade kit -$440
http://www.ecstuning.com/BMW-E90-335....0L/ES2622633/
Prothane solid rear subframe bushing kit - $179
http://www.prothanesuspensionparts.c...sp?prod=KDT917
Best part - DIY install
The upgrade made a huge difference. It really comlpeted my car. I'm excited driving it all over again. So for $620 no complaints at all.
I highly suggest this upgrade to anyone thinking about upgrading your suspension. No down side at all and helps the rest and really helps the dampeners and springs work properly.
Last thing for me will probably be adjustable rear toe link - but that's down the line.