i think that my next modification will be to change
the sway bars for fatter ones. i'm looking for some
options and recommendations
080.0900.05 G-POWER antiroll bar kit - Sport - GS E34 4Cyl./6Cyl./8Cyl.
Reduction of the sideways overturn by 60 per cent (manufactured of hydroformed steel). No loss of comfort, optimal function in connection with G-POWER progressive sports springs. Complete set front- (Ø27mm) and rear (Ø20mm) axle incl. rubber bushings.

Application: Saloon/Touring

Additionally included in the package: G-POWER assembly instructions, G-POWER lubricant, G-POWER guarantee certificate, G-POWER sticker, TÜV-approval at \"G-POWER Brunsbüttel\" possible
i've found those so far for my 91 535i. i know mtech makes a set too
but i'd imagine those are hard to come by?

also racing dynamics makes some sways too

what do you guys think about these various offerings?

here's what bmwe34.net has to say, but i know that a lot of
people on the board have different opions, and i'd like to hear
them all

Sway bars tie the lower suspension components together accross the front and the back, they affect the car oversteer and understeer. Bigger sway bars improve stability while cornering, the best setting is fully soft for the front and hard for the back.

Stock: Front: 23mm - Rear: 15mm.
Sport suspension: Front: 24mm - Rear: 18mm.
M-Technic suspension/US E34 M5 3.6: Front: 31 35 2 226 333 - 25mm Rear: 33 55 2 226 507 - 18mm
Eibach: Front 26mm - Rear: 13mm. (yes, I called them to confirm)
Racing Dynamics: Front 27mm - Rear: 19mm.

Also there were Nuerburing (BMW's spelling) rear swaybars for the M5 Touring. These were the biggest rear bars ever offered. These may be the perfect complement to the 27mm bar offered by RD as their front rear ratios are highly biased to understeer and these may improve the situation somewhat. Rear 33 55 2 227 416 - 20mm

31 35 2 227 276 $118.00 (m5t front)
31 55 2 226 334 $6.00 ea. (mounts)
33 55 2 227 005 $108.00 (m5t rear, 19mm)
33 55 2 227 006 $4.00 ea. (mounts)
33 55 2 227 416 $124.00 (N'burgring m5t rear, 20mm)
33 55 2 227 240 $4.00 ea. (mounts)

With a 20-25% parts discount offered by several BMW dealers in Roundel, and considering that rubber bushings are available from the factory (much quieter and transmit less vibration), the factory bars are a pretty decent choice without being prohibitively expensive. However, there is a time factor to getting these items as they have to ship from Germany, those ordering the Euro parts will have to be patient...