KYB KG54317 Shock Absorber - Rear

KYB Gas-a-just Rear Shock for Toyota 4Runner

The KYB Gas-a-just KG54317 is a monotube suspension shock absorber built as an OE-style replacement for the rear of 1996-2002 Toyota 4Runner models. It is engineered to restore original ride control while adding the firmer damping response needed for towing, work use, and heavier wheel-and-tire setups.

Key Features

• Monotube design with separate gas and oil chambers for consistent response and fade-resistant operation
• Up to 25% more damping performance than original equipment shocks
• Built specifically for Toyota 4Runner rear suspension applications
• Higher gas pressure improves steering response and overall control
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Supports vehicles that work, tow, or run larger, heavier tires and wheels
• Dust cover included

Product Details

The Gas-a-just line is KYB’s monotube shock absorber series for drivers who want OE replacement fit and a more responsive feel. The KG54317 uses an air-free hydraulic working area for control and a high-pressure nitrogen chamber with a floating piston to separate gas from oil. That design helps maintain consistent damping during normal driving and delivers quicker reaction when the suspension is loaded. For a Toyota 4Runner rear shock replacement, this part number is a direct match for restoring suspension performance without changing the vehicle’s intended setup.

This part cross-references Monroe Shocks & Struts 37157 for the same application.

Common Problems This Shock Can Address

• Excessive rear bounce after bumps or dips
• Reduced control when towing or carrying added load
• Soft or inconsistent rear suspension response
• Fluid leakage from worn shock seals
• Loss of stability with larger, heavier tires and wheels

Installation Notes and Tips

Fits 1996-2002 Toyota 4Runner, rear. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. Verify mount style and compressed/extended length before installation. The KG54317 uses upper mount type S1 and lower mount type E1L/E(19), with a compressed length of 12.95 in., extended length of 20.12 in., and stroke length of 7.17 in.

Quality Assurance

KYB designs Gas-a-just shocks as OE monotube replacements to help restore factory suspension behavior with added damping capacity. The KG54317 is built with a high-pressure monotube layout and a chrome piston rod to support long-term sealing performance and consistent rear suspension control on the Toyota 4Runner.