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 -
The later model Euro 3.8L M5 had a different
front bar, that from all reports was stiffer than that provided
in the 3.6L models (although it was the same thickness). These
were standard on M5 Tourings. Front: 31 35 2 227 276 - 25mm
bar from 3.8L M5 & M5 Touring.
The later Euro 3.8L M5's (after 6/94) came with a larger rear
bar. These were standard on M5 Tourings. Rear: 33 55 2 227
005 - 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...
Information provided by Phaedrus