KYB KG54321 Shock Absorber - Rear

KYB Gas-a-just Rear Shock for Dakota, Durango, Raider

The KYB Gas-a-just shock absorber is a monotube rear suspension shock built for trucks and SUVs that need firmer control than a standard twin-tube design. Part number KG54321 is engineered for rear applications on the Dodge Dakota, Ram Dakota, Dodge Durango, and Mitsubishi Raider, with response that stays consistent under load and during repeated suspension movement.

Key Features

• Adds up to 25% more damping performance over original equipment shocks
• Monotube construction separates gas and oil for fade-resistant operation and quick response
• High-pressure nitrogen gas chamber supports comfort in normal driving and adds damping on demand
• Built with truck-specific components and valving for heavier-duty rear suspension use
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Improves steering response and helps maintain suspension control with larger tires and wheels
• Supports proper operation of electronic safety systems by helping the suspension perform as designed

Product Details

KYB Gas-a-just part KG54321 uses two separate working chambers: an air-free hydraulic section for control and a high-pressure gas section with a floating piston for consistent damping. That design helps the rear suspension react quickly without the fade commonly associated with aeration in conventional shock absorbers. This rear shock is a direct-fit suspension replacement for 1997-2011 Dodge Dakota, 1999-2003 Dodge Durango, 2006-2009 Mitsubishi Raider, and 2011 Ram Dakota rear applications.

This part cross-references Monroe Shocks & Struts 37138 for the same application.

What It Helps Address

• Excessive rear bounce after bumps or dips
• Reduced control when towing or carrying heavier loads
• Soft or delayed rear suspension response
• Shock fade during repeated compression and rebound cycles
• Uneven rear stability with larger tires and wheels

Installation Notes and Fitment

Fits 2011 Ram Dakota, Rear.

Fits 1997-2010 Dodge Dakota, Rear.

Fits 2006-2009 Mitsubishi Raider, Rear.

Fits 1999-2003 Dodge Durango, Rear.

Verify compressed length 14.53 in., extended length 23.15 in., and stroke length 8.62 in. before installation. Upper and lower mounts are E2 (12x42), and a dust cover is included. Internal rebound spring and B-stop are not included in this design. For best results, replace rear shocks in matched pairs and confirm the vehicle’s rear suspension condition before installation.

Quality Assurance

KYB designs the Gas-a-just line for truck and SUV suspension demands, using monotube construction and high-pressure gas separation to maintain consistent damping performance. Part number KG54321 is built to support stable rear suspension operation on Dakota, Durango, Raider, and Ram Dakota applications.