I have read a few links already on sway bar mods that people have done on e39 540s but I was wondering if anyone has specifically done just the M5 rear stabilizer bar upgrade only. I know people have done the Eibach 28/18mm f/r and Dinan 27/17(adjustable)mm swaybar upgrades and it seems the car corners much flatter - some claim ~85% flatter. I have a 01'5406MT with M-Technic suspension wish comes with 25/15mm f/r swaybars, so I am considering either spending ~$140 for the rear M5 bar which I can install myself, or spend 1200 with Dinan installed by the dealer. The bulk of the cost is in the install of the front bar. Does anyone know how, or can anyone feel the difference just doing the 16.5mm M5 rear swaybar make - enough to make a 10x difference to justify the price??
Thanks in advance.