Buy OEM 1991 Buick Part # 10360682. Suspension Stabilizer Bar (Rear). 3.6 liter. 4.6 liter, w/o AWD. STS; w/AWD; 3.6L. STS; w/o AWD. Rear suspension. stabilizer bar and

Stabilizer.
Suspension Stabilizer Bar. Anti SwayBar. Shaft -. Suspension SwayBar.

Suspension Stabilizer Bar

Fits STS

3.6 liter. 4.6 liter, w/o AWD. STS; w/AWD; 3.6L. STS; w/o AWD.