KYB KG4517 Shock Absorber - Front

KYB Gas-a-just Front Shock for Mustang and Cougar

The KYB Gas-a-just KG4517 is a monotube suspension shock absorber built for classic Ford performance applications. It delivers firmer control than a traditional twin-tube design, with fast response and fade-resistant operation for drivers who want more stability from their front suspension.

Key Features

• Adds up to 25% more damping performance over original equipment shocks
• Monotube design separates gas and oil for consistent, fade-free operation
• High-pressure nitrogen chamber provides instant response when suspension demand increases
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Valving and components are engineered specifically for classic Ford cars
• Higher gas pressure improves steering response and front-end control
• Supports vehicles that work, tow, or run larger, heavier tires and wheels

Product Details

Gas-a-just is KYB’s performance-oriented monotube shock line, designed to react quickly to changing road conditions while maintaining a comfortable ride during normal driving. The KG4517 uses separate working chambers for hydraulic control and high-pressure gas support, which helps maintain damping consistency under load. This part cross-references Monroe Shocks & Struts (e.g., 33059) for the same application.

Compatible With 1964-1970 Ford Mustang, front and 1967-1970 Mercury Cougar, front. The KYB KG4517 is a direct-fit front shock absorber for these classic applications and is commonly searched as a front shock for 1964-1970 Ford Mustang or 1967-1970 Mercury Cougar suspension repair.

What It Helps Address

• Excessive front-end bounce after bumps
• Loose or delayed steering response
• Reduced control from worn OE-style shocks
• Shock fade during repeated suspension movement
• Fluid leakage related to seal wear

Installation Notes

Verify compressed length, extended length, stroke length, and mount style before installation. KG4517 uses a special lower mount and an E3 upper mount configuration, so matching the original suspension setup is important. This front shock absorber is intended for the listed Mustang and Cougar applications and should be installed according to the vehicle’s service procedure.

Quality Assurance

KYB designs Gas-a-just shocks with a monotube layout that separates gas and oil for stable damping and quick response. The triple chrome plated piston rod is used to reduce seal wear, and the product is engineered to maintain the suspension performance expected by the vehicle manufacturer’s systems.