KYB KG4509 Shock Absorber - Front

KYB Gas-a-Just Shock for Dodge Dart

The KYB Gas-a-Just KG4509 is a monotube suspension shock absorber built for classic Dodge Dart front suspension service. It is engineered as an OE-style replacement for vehicles that need firmer control, quicker response, and stable damping under everyday driving or heavier use.

For 1962-1976 Dodge Dart front applications, this Gas-a-Just design separates gas and oil into two working chambers to deliver consistent response and reduced fade. The KG4509 is part of KYB’s Gas-a-Just line, which is tuned for classic Mopar suspension needs and added damping performance over original equipment.

Key Features

• Part number KG4509 for front suspension service
• Monotube shock absorber design for responsive damping
• Up to 25% more damping performance than original equipment shocks
• High-pressure nitrogen gas chamber for fade-resistant operation
• Triple chrome plated piston rod helps reduce seal wear
• Designed specifically for classic Mopars, including Dodge Dart applications
• Improved steering response for vehicles with larger, heavier tires and wheels
• Dust cover included

Product Details

The KYB Gas-a-Just line is built around a high-pressure monotube layout that keeps the gas and oil separated for immediate reaction and consistent control. That makes the KG4509 a practical choice for a Dodge Dart front shock replacement when the goal is to restore suspension control without sacrificing ride quality during normal driving. The part number KG4509 is also a useful reference when comparing OE-style replacement options for classic Mopar suspension work.

This part cross-references Monroe Shocks & Struts (e.g., 32022) and Gabriel (e.g., 82090) for the same application.

What It Helps Address

• Excessive front-end bounce or oscillation
• Reduced steering response during lane changes or cornering
• Shock fade from repeated suspension movement
• Loss of control on vehicles with heavier wheels and tires
• Wear-related ride instability on classic Dodge Dart front suspension

Installation Notes

Compatible with 1962-1976 Dodge Dart front suspension applications. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. Verify mount style and dimensions before installation: compressed length 9.53 in, extended length 14.72 in, stroke length 5.2 in, lower mount type E2(11.1X32), upper mount type S1.

Quality Assurance

KYB designs the Gas-a-Just line as an OE monotube replacement, with valving and components tailored for classic Mopar suspension requirements. The high-pressure design and chrome piston rod are intended to support consistent damping performance and reduced seal wear in normal service.