KYB KG4515 Suspension Shock Absorber - Front

KYB Gas-a-Just Front Shock Absorber KG4515

The KYB Gas-a-Just KG4515 is a front monotube shock absorber built for classic full-size cars and performance-oriented street use. It adds firmer damping response than many original equipment shocks, with a design that separates gas and oil to reduce fade and maintain control during repeated suspension movement.

Key Features

• Monotube design with separate hydraulic and high-pressure gas chambers for consistent 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 tailored for classic cars, heavier wheels, and work-oriented use
• Supports electronic safety systems by helping the suspension operate as engineered
• Compressed length: 9.65 in; extended length: 14.57 in; stroke length: 4.92 in

Product Details

Gas-a-Just is KYB’s monotube shock line for drivers who want more immediate damping response than a conventional twin-tube design. The KG4515 uses an air-free hydraulic working area for control and a high-pressure nitrogen chamber with a floating piston to deliver a stable ride in normal driving and added damping when the suspension is working harder. This part cross-references Monroe Shocks & Struts 5906 and Gabriel 69675 for the same application. It is a front shock absorber for a wide range of classic GM and Ford platforms, including Chevrolet Impala, Buick LeSabre, and Cadillac Fleetwood applications.

What It Helps Address

• Excessive front-end bounce after bumps or dips
• Reduced steering response from worn shocks
• Shock fade during repeated suspension movement
• Fluid leakage caused by seal wear
• Loss of control on heavier classic cars, larger tires, or loaded vehicles

Installation Notes

Fits 1991-1996 Buick Roadmaster, front; 1993-1996 Cadillac Fleetwood, front; 1971-1996 Chevrolet Caprice, front; 1992-1994 Ford Crown Victoria, front; 1983-1994 Mercury Grand Marquis, front; and additional front applications listed in the fitment data. Verify upper mount type S1 and lower mount type E3 (51.6 x 82 x 20) before installation. This part is for front-position use only and should be matched to the vehicle’s suspension configuration, including exclusions for electronic suspension, limousine, police, and taxi applications where noted.

Quality Assurance

KYB designs the Gas-a-Just line with monotube construction, high-pressure gas separation, and chrome-plated rod finish to support consistent damping and reduced wear over time. The KG4515 is engineered for direct-fit replacement use on confirmed front applications across classic Buick, Cadillac, Chevrolet, Ford, Lincoln, Mercury, Oldsmobile, and Pontiac models.