Audi20v.net

The early '90 cars came with just a front sway bar. Later '90 and all '91 came with a bigger front bar and a rear bar, too. Several of the normal performance vendors will add/upgrade both the front and rear bars. The following basic details are for adding a rear bar to the early cars, or beefing up the bar on the later cars. Be aware that adding/changing the rear bar without modifying the front one will change the car's handling characteristics--specifically, it will have more tendency to oversteer.

Adding a 4000 Quattro front sway bar to the rear of a 20V (Ray Tomlinson, Rick Houck)
The rear control arms on the 20v are identical to the front control arms on the 4KQ. Here are the parts required:

• Front swaybar - pick one up at a salvage yard, list is over $180

P/N 857 411 301 D
• Link ends (x2) ~$20 each

P/N 857 407 469 A
• Washers (x8) ~$1.50 each

P/N 857 407 477 A
• Lower Sleeve (x2) ~$2.10 each

P/N 857 407 480
• Lower Mount Bushing (x2) ~$2.30 each

P/N 857 407 474
• Upper Sleeve (x2) ~$2.10 each

P/N 857 407 479 A
• Upper Mount Bushing (x2) ~$2.30 each

P/N 857 407 473 A
• Nuts (x4) ~$0.70 each

P/N N 011 18 49
• Subframe Mount Bushing (x2) ~$2.60 each

P/N 811 411 327 B

You will need to fabricate two brackets to support the bar against the subframe. One option is to find a generic swaybar mounting kit and bolt the swaybar mounts to the bracket that holds the inner portion of the rear tie rods. You also may need to find some subframe mount bushings other than those listed that will fit into your custom bracket.