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KYB Gas-A-Just Rear Monotube Shock Absorber for 1984-1992 BMW 3-Series (318/325/M3) - KG4539

$66.10

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KYB Gas-A-Just Rear Monotube Shock Absorber for 1984-1992 BMW 3-Series (318/325/M3) - KG4539

$66.10

$66.10

Fits 1984-1992 BMW 318i, 318is, 325, 325e, 325i, 325is, 325iX, and M3 models.

The KYB Gas-A-Just is a high-performance monotube shock absorber designed to restore and exceed your BMW's original handling characteristics. Unlike standard twin-tube shocks, the Gas-A-Just utilizes two separate working chambers to provide more responsive control. The air-free hydraulic piston area maintains consistent damping, while a second high-pressure nitrogen gas chamber with a floating piston reacts instantly to road conditions, ensuring a stable ride during normal driving and aggressive performance on demand.

This monotube design effectively eliminates aeration and foaming, a common cause of performance fade in lesser shocks. For a complete suspension refresh and to minimize noise or vibration, KYB recommends pairing this shock with new strut mounts (part number: SM5013).

  • Manufacturer Part Number: KG4539
  • Position: Rear
  • Design: Monotube high-pressure nitrogen gas
  • Construction: Separate hydraulic and gas chambers with floating piston
  • Benefits: Eliminates performance fade, increases responsiveness, and restores OE ride quality
🔧 Fitment & Compatibility
Year Make Model Submodel
1984-1985,1991-1992 BMW 318i Base
1991-1992 BMW 318is Base
1986-1988 BMW 325 Base
1984-1987 BMW 325e Base
1988-1991 BMW 325i Base
1988-1991 BMW 325is Base
1988-1991 BMW 325iX Base
1988-1991 BMW M3 Base

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