KYB 743021 Shock Absorber - Rear

KYB AGX Rear Shock for Mustang

The KYB AGX 743021 is a manually adjustable rear suspension shock absorber for 1994-2004 Ford Mustang models. It gives Mustang owners a direct way to tune ride control for street driving or track use without special tools.

Compatible with 1994-2004 Ford Mustang rear applications, this KYB AGX shock is built for drivers who want more control than a standard OE replacement can provide. The AGX line focuses on adjustable damping, quick external access, and consistent response from one setting to the next.

Key Features

• Manually adjustable performance shock absorber for enthusiast use
• Adjustable damping can add up to 125% more force than the OEM design on Ford Mustang applications
• External adjustment does not require lifting the vehicle or removing the tires
• Precision multi-stage hydraulic valves provide a broad performance range
• Seamless working cylinder and Teflon-coated piston band support sealing and service life
• Engineered to work with vehicles equipped with electronic safety systems such as ESC and ABS
• Dust cover included
• Lower mount type: E2 (12.8 x 38); upper mount type: S1 (12 mm)
• Compressed length: 13.78 in; extended length: 19.69 in; stroke length: 5.91 in

About KYB AGX

KYB AGX is the brand’s adjustable performance line for drivers who want to fine-tune suspension response. Depending on the vehicle application, the shock uses either an eight-position knob or a four-position screwdriver slot, but both designs provide the same adjustment range. One adjustment changes rebound and compression damping together, making it easier to tailor the rear suspension on a Ford Mustang 743021 application.

What It Helps Address

• Excessive rear suspension softness during spirited driving
• Reduced tire contact under changing road or track conditions
• Need for firmer damping without replacing the entire suspension system
• Inconsistent handling response from worn rear shocks
• Difficulty dialing in ride control for street and performance use

Installation Notes

Fits 1994-2004 Ford Mustang, rear. Verify mount style and dimensions before installation, and set the damping position to match your driving conditions. The external adjuster allows changes without removing the tire, which makes tuning easier after the shock is installed. Part number 743021 is commonly searched as KYB 743021 for rear Mustang suspension service.

Quality Assurance

KYB designs the AGX line for adjustable ride control and consistent damping response. This part number 743021 is built with a sealed cylinder and coated piston band to support long-term operation in demanding suspension use. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.