Buy 1986 Subaru RS Coil Spring R (Rear). Suspension Coil Spring Your coil springs are not especially - OEM Subaru Part # 21105GA060 (21045GA410)

Coil Spring.

COIL SPRING-REAR Coil Spring

Fits DL, GL, GL10, Loyale, RS, RX, XT

Suspension Coil Spring
Your coil springs are not especially prone to failure, but if they have been cut, clamped, or heated to have the vehicle lowered, your 1986 Subaru RS might benefit from replacing the strut springs. Excessive rust can make the springs more prone to failure. Contact your local Subaru service department to have your suspension system evaluated.