KYB KG6410 Shock Absorber - Rear

KYB Gas-a-Just Rear Shock for Heavy-Duty GM Chassis

The KYB Gas-a-just KG6410 is a monotube suspension shock absorber built for rear applications on Chevrolet P30 and GMC P3500 motorhome chassis. It uses separate gas and oil chambers for quick response, consistent damping, and reduced fade during demanding driving.

Key Features

• Monotube design with air-free hydraulic control for responsive damping
• High-pressure nitrogen gas chamber for fade-resistant operation
• Up to 25% more damping performance than original equipment shocks
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Engineered for heavy-duty trucks, towing, and larger wheel and tire setups
• Dust cover included

Product Details

Gas-a-Just is KYB’s performance-oriented shock line for vehicles that work harder than a standard passenger car. On Chevrolet P30 and GMC P3500 rear suspension applications, the KG6410 adds firmer control and faster steering response while maintaining a controlled ride in normal driving. The monotube layout separates gas and oil to help maintain damping consistency, and the high gas pressure supports the suspension when load, road input, or chassis demands increase. This part number, KG6410, is also cross-referenced to Monroe Shocks & Struts 557004 for the same application.

Vehicle Fitment

• Fits 1975-1999 Chevrolet P30, rear, Motorhome Chassis; Gas-a-just
• Fits 1985-1999 Chevrolet P30, rear, Motorhome Chassis w/ Mor/Ryde Rear Susp. -Check the Mor/Ryde service part number for the proper shocks.; w/ Service # U0109010; Gas-a-just
• Fits 1979-1999 GMC P3500, rear, Motorhome Chassis; Gas-a-just
• Fits 1985-1999 GMC P3500, rear, Motorhome w/ Mor/Ryde Rear Susp. -Check the Mor/Ryde service part number for the proper shocks.; w/ Service # U0109010; Gas-a-just
• Fits 1985 GMC P3500, rear, Motorhome Chassis with Monobeam Front Suspension; Gas-a-just

Common Uses

• Rear shock replacement for worn or leaking Chevrolet P30 and GMC P3500 motorhome chassis shocks
• Improved control on heavy-duty chassis carrying higher loads
• Reduced shock fade during repeated suspension movement and rough-road use
• Sharper steering response when the rear suspension needs firmer damping support
• Restoration of suspension performance when original shocks no longer control body motion effectively

Installation Notes

Verify compressed length, extended length, and mount style before installation. KG6410 measures 14.21 inches compressed, 23.19 inches extended, and 8.98 inches of stroke, with E2(14.6x41) upper and lower mounts. Confirm Mor/Ryde service information where listed, since those applications require the correct service part number for proper shock selection.

Quality Assurance

KYB designs Gas-a-Just shocks with a monotube construction intended to maintain consistent damping under demanding conditions. The triple chrome plated piston rod is used to help reduce seal wear and support long-term sealing performance.