KYB KG4605A Shock Absorber - Front

KYB Gas-a-just Front Shock Absorber

The KYB Gas-a-just KG4605A is a front monotube shock absorber built for import trucks that need firmer control, quicker response, and stable damping under load. It is a direct-fit suspension shock for select Nissan Pickup, Nissan D21, Nissan 720, and Isuzu Pickup applications.

Gas-a-just shocks use a high-pressure monotube design with separate gas and oil chambers to reduce fade and maintain consistent performance during normal driving and heavier-duty use. The KG4605A is a strong OE-style upgrade for front suspension service on trucks with towing, work, or larger wheel and tire setups.

Key Features

• Part number KG4605A front suspension shock absorber
• Monotube design separates gas and oil for fade-resistant operation and fast response
• Up to 25% more damping performance than original equipment shocks
• Valving and components tuned for import truck applications
• Higher gas pressure improves steering response and front-end control
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Dust cover included
• Compatible with electronic safety systems that rely on proper suspension behavior

Product Details

KYB Gas-a-just shocks are designed for drivers who want more control from the front suspension without sacrificing everyday ride quality. The KG4605A uses an air-free hydraulic piston area for responsiveness and a separate high-pressure nitrogen gas chamber for consistent damping. That design helps the shock react quickly when the truck is loaded, braking, cornering, or carrying heavier tires and wheels. This part number KG4605A is a practical replacement for worn front shocks on Nissan Pickup, Nissan D21, Nissan 720, and Isuzu Pickup models.

This part cross-references Monroe Shocks & Struts (e.g., 37077) for the same application.

What It Helps Solve

• Excessive front-end bounce after bumps
• Reduced steering response from worn shocks
• Shock fade during repeated suspension movement
• Uneven control on work trucks or towing setups
• Noise and wear associated with deteriorated front damping

Installation Notes and Fitment

Fits 1995-1997 Nissan Pickup, front.

Fits 1987-1995 Isuzu Pickup, front.

Fits 1986-1994 Nissan D21, front.

Fits 1986 Isuzu Pickup, front; from 8/86.

Fits 1980-1986 Nissan 720, front.

Verify compressed length 8.27 in., extended length 12.4 in., and stroke length 4.13 in. before installation. Lower mount type is E2(12X32) and upper mount type is S1. Dust cover is included; internal rebound spring, B-stop, and R-stop are not included.

Quality Assurance

KYB designs the Gas-a-just line as a monotube performance shock for trucks that need consistent damping and improved front suspension control. The KG4605A follows that product-line approach with high-pressure gas separation, OE-focused fitment, and corrosion-resistant piston rod construction.