KYB 553361 Suspension Shock Absorber - Rear

KYB Gas-a-just Rear Shock for Tacoma

The KYB Gas-a-just 553361 is a rear monotube shock absorber built for 1999-2004 Toyota Tacoma applications. It is engineered to deliver firmer control than a conventional twin-tube design while maintaining a controlled ride during normal driving.

For Tacoma owners looking for a rear shock that responds quickly under load, towing, or with larger wheels and tires, the Gas-a-just line adds damping performance and helps reduce fade from aeration. This part number 553361 is designed around Toyota Tacoma fitment and rear suspension demands.

Key Features

• Monotube shock design with separate gas and oil chambers for consistent response
• Up to 25% more damping performance over original equipment shocks
• Higher gas pressure improves steering response and suspension control
• Fade-resistant operation from the high-pressure nitrogen gas design
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Designed specifically for Toyota Tacoma rear applications
• Dust cover included

Product Details

KYB Gas-a-just shocks use an air-free hydraulic working area for control and a high-pressure nitrogen chamber with a floating piston for added performance on demand. That design helps the shock react quickly when the suspension is working harder, which is useful on a Toyota Tacoma used for towing, hauling, or running heavier tires and wheels. Part number 553361 is a rear shock absorber with E1 upper and lower mounts, 12.64 inches compressed length, 19.45 inches extended length, and 6.81 inches of stroke.

This part cross-references Monroe Shocks & Struts 37112 for the same application.

What It Helps Address

• Excessive rear bounce or oscillation on rough roads
• Reduced control when towing or carrying added weight
• Shock fade from heat and aeration during repeated suspension movement
• Slow response in rear suspension damping
• Wear-related fluid leakage from piston rod seal wear

Installation Notes

Fits 1999-2004 Toyota Tacoma, rear. Verify mount style, compressed length, extended length, and stroke before installation. This shock uses E1 upper and lower mounts and includes a dust cover. Confirm suspension condition and inspect related bushings and hardware during replacement.

Quality Assurance

KYB designs the Gas-a-just line as a monotube shock absorber with performance-focused valving and construction for vehicles that work under load. The triple chrome plated piston rod and high-pressure gas architecture are used to support consistent damping and reduced seal wear in demanding rear suspension service.