KYB 734059 Suspension Strut - Rear

KYB AGX Rear Suspension Strut for GM Performance Tuning

The KYB AGX rear suspension strut gives drivers manual control over ride damping for a more tailored setup on the street or at the track. This KYB AGX 734059 is built for select Buick, Chevrolet, Oldsmobile, and Pontiac rear applications, including Buick Regal, Pontiac Grand Prix, and Chevrolet Impala models with the listed wheel and trim restrictions.

Key Features

• Manually adjustable performance strut for enthusiast-focused ride control
• Adjustment can add up to 125% more damping force on select GM applications
• External adjustment without lifting the vehicle or removing the tires
• Precision multi-stage hydraulic valves for a wider damping range
• Seamless working cylinder with a Teflon-coated piston band for sealing and durability
• Engineered to work with vehicles equipped with electronic safety systems such as ESC and ABS
• Rear application with 14x1.50 upper mount type

Product Details

KYB AGX is the brand’s adjustable performance line, created for drivers who want to fine-tune suspension response without special tools. Part number 734059 uses a manual adjustment design that changes both rebound and compression damping with one setting, making it easier to adapt the rear suspension to changing road conditions or performance driving. For GM cars such as the Buick LaCrosse, Buick Century, Buick Regal, Chevrolet Impala, Chevrolet Monte Carlo, Pontiac Grand Prix, and Oldsmobile Intrigue, this rear strut provides a direct performance-oriented replacement where OE-style damping is not enough.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Excessive rear body motion during cornering or braking
• Soft or inconsistent damping from worn suspension struts
• Need for adjustable ride control on a GM performance sedan
• Reduced tire contact caused by weak rear suspension response
• Suspension tuning for mixed street and track use

Installation Notes and Tips

Compatible With 2005-2009 Buick LaCrosse, rear; 1997-2005 Buick Century, rear; 1997-2004 Buick Regal, rear; 2004-2005 Chevrolet Impala, rear; 2000-2003 Chevrolet Impala, rear; 2004-2005 Chevrolet Monte Carlo, rear; 2000-2003 Chevrolet Monte Carlo, rear; 1997-2003 Pontiac Grand Prix, rear; and 1998-2002 Oldsmobile Intrigue, rear, with the listed wheel and trim exclusions. KYB recommends replacing the rear strut mounts with SM5398 and SM5399 to reduce noise and vibration, and using KYB strut boot SB128 to help protect the strut from dirt, debris, and salt.

Quality Assurance

KYB designs the AGX line for precise damping control and long service life, using a sealed cylinder and coated piston band to support consistent operation. The part is engineered to maintain tire contact and vehicle control under changing driving conditions.