KYB 553364 Shock Absorber - Rear

KYB Gas-a-Just Rear Shock for Crossfire

The KYB Gas-a-Just 553364 is a monotube shock absorber built as an OE-style replacement for restoring original suspension response. It is engineered for the rear of the 2004-2008 Chrysler Crossfire and uses a high-pressure gas design to improve control, steering response, and fade resistance during demanding driving.

Key Features

• Monotube OE replacement for the correct suspension shock application
• Fits 2004-2008 Chrysler Crossfire, rear
• Separate gas and oil chambers for consistent damping and quick response
• High-pressure nitrogen gas supports stable performance under load
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Designed for vehicles that tow, work, or use larger, heavier tires and wheels
• Supports electronic safety systems by helping the suspension operate as designed

Product Details

Gas-a-Just is KYB’s monotube product line for drivers who want firmer control than a conventional twin-tube design. The 553364 uses an air-free hydraulic piston area for responsiveness and a separate high-pressure nitrogen chamber with a floating piston for consistent operation. This design helps maintain ride quality in normal driving while delivering immediate damping response when the suspension is loaded harder. This part cross-references Monroe Shocks & Struts 39045 for the same application.

What It Helps Address

• Excessive rear bounce or oscillation
• Reduced steering response from worn rear shocks
• Shock fade during repeated suspension movement
• Fluid leakage caused by seal wear
• Loss of control feel on a Chrysler Crossfire rear suspension

Installation Notes

Fits 2004-2008 Chrysler Crossfire, rear. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. Verify mount style and dimensions before installation: compressed length 15.17 in., extended length 19.33 in., stroke length 4.16 in. Upper mount type is S1 and lower mount type is E2(10X40). Dust cover and bump stop are included.

Quality Assurance

KYB designs Gas-a-Just shocks as OE monotube replacements to restore factory handling characteristics. Part number 553364 is built for direct-fit rear suspension service on the Chrysler Crossfire and follows KYB’s monotube construction standards for controlled, fade-resistant operation.