KYB KG9101 Suspension Strut - Rear

KYB Gas-a-just Rear Strut for Nissan Applications

The KYB Gas-a-just KG9101 is a rear suspension strut built for Nissan and Datsun applications that need firmer control than a standard twin-tube design. It uses a monotube layout with separate gas and oil chambers for quick response, consistent damping, and reduced fade during demanding driving.

Gas-a-just Performance Line

KYB’s Gas-a-just line is aimed at vehicles that work harder than average, including those used for towing, carrying heavier wheels and tires, or driving with a more performance-focused suspension feel. The KG9101 follows that approach with higher gas pressure for faster steering response and damping that can add up to 25% more control than original equipment shocks.

Key Features

• Monotube design separates gas and oil for fade-resistant operation and immediate response
• Up to 25% more damping performance than original equipment shocks
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage risk
• Higher gas pressure improves steering response and suspension control
• Dust cover included for added protection
• Built with application-specific valving for Nissan and Datsun rear suspension use
• Supports electronic safety systems by helping the suspension operate as intended

Detailed Description

Part number KG9101 is a KYB Gas-a-just rear suspension strut with a compressed length of 14.21 inches, an extended length of 21.3 inches, and a 7.09-inch stroke. It uses an E2(20X40) lower mount and an S1 upper mount, with B-stop and R-stop features noted in the design. The monotube construction keeps the hydraulic working area and high-pressure nitrogen chamber separate, which helps maintain consistent damping over repeated use. This makes the KG9101 a practical choice for Nissan Maxima, Nissan 280ZX, and Nissan 810 rear suspension service where firmer control is desired. This part cross-references Monroe Shocks & Struts 71209 for the same application.

What This Strut Helps Address

• Excessive rear-end bounce or oscillation
• Reduced control during braking, cornering, or load transfer
• Shock fade from heat and repeated suspension movement
• Steering response that feels delayed or less precise
• Wear concerns tied to fluid leakage and seal wear

Installation Notes and Fitment

Fits 1981-1984 Nissan Maxima, rear. Fits 1981 Nissan 280ZX, rear, TO 8/81. Fits 1977-1981 Nissan 810, rear. Fits 1979-1980 Nissan 280ZX, rear. Verify mount style, compressed length, and extended length before installation to confirm proper suspension travel and fitment. The replacement unit includes a new dustcover and bumper assembly per the listed application notes.

Quality Assurance

KYB designs Gas-a-just monotube dampers with application-specific valving and durable piston rod construction to support consistent suspension performance in Nissan rear applications. KG9101 is engineered for controlled operation under demanding driving conditions and for maintaining the suspension behavior expected by the vehicle manufacturer.