KYB KG4529 Shock Absorber - Rear

KYB Gas-a-Just Rear Shock for Porsche 924/944

The KYB Gas-a-Just KG4529 is a monotube rear shock absorber built as an OE-style replacement for select Porsche applications. It uses separate hydraulic and high-pressure gas chambers to deliver responsive damping, stable control, and consistent ride quality during normal driving and harder use.

Key Features

• Monotube design separates gas and oil for fade-resistant operation and quick response
• Up to 25% more damping performance than original equipment shocks
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Higher gas pressure improves steering response and suspension control
• Valving and components are tuned for Porsche 924 and Porsche 944 rear applications
• Dust cover included
• Lower mount type: E2(12X48); upper mount type: E2(12X42)

Product Details

Gas-a-Just is KYB’s monotube shock line for drivers who want firmer control than a conventional twin-tube design. The KG4529 uses an air-free hydraulic working area for damping response and a separate nitrogen gas chamber with a floating piston to maintain consistent performance. For rear suspension service on the Porsche 924 and Porsche 944, this part number is engineered to restore original handling characteristics while adding additional damping reserve for heavier wheels, towing use, or more demanding road conditions. This part cross-references Monroe Shocks & Struts (e.g., 5910) for the same application.

What It Helps Address

• Excessive rear-end bounce after bumps
• Reduced steering response from worn shock absorbers
• Fluid leakage from aging shock seals
• Fade during repeated suspension movement
• Loss of control with heavier tires and wheels

Installation Notes

Fits 1984 Porsche 944, rear; recommended OEM replacement, to 12/84. Fits 1983 Porsche 944, rear; replace the suspension strut and coil spring assembly according to manufacturer instructions. Fits 1977-1982 Porsche 924, rear; recommended OEM replacement, except sport suspension. Verify compressed length, extended length, stroke, and mount style before installation. Part number KG4529 should be matched to the vehicle’s rear suspension configuration before service.

Quality Assurance

KYB designs Gas-a-Just shocks as OE monotube replacements to restore factory-style suspension performance. The KG4529 is built with a high-pressure monotube layout and a chrome piston rod to support consistent operation and reduced seal wear.