Firm up the ride and control body motion with the KYB Gas-a-Just Suspension Shock Absorber 553361, a high-pressure monotube gas shock that installs as a direct-fit rear replacement for the 1999-2004 Toyota Tacoma. See the Buyer's Guide tab for engine-level applications.
- Monotube gas design: Uses two separate working chambers — an air-free hydraulic piston and valve area for responsiveness and control, plus a high-pressure nitrogen gas area with a floating piston that separates the gas and oil for fade-free operation and instant response.
- Extra damping: Adds up to 25% more damping performance over original-equipment shocks, with additional damping over the OE design for vehicles that work, tow, and run larger, heavier tires and wheels.
- Tacoma-specific tuning: Components and valving designed specifically for Toyota Tacomas.
- Triple chrome-plated piston rod: An ultra-smooth rod helps reduce seal wear; since fluid leaking can be a cause of shock failure, this addresses a common wear point.
The higher gas pressure responds quickly to help improve steering response, and the Gas-a-Just helps keep electronic safety systems performing as the vehicle manufacturer intended. Sold individually; order 2 for a complete rear-axle replacement.
Interchange: G63689 · 37112 · 48531A9030
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What vehicle does this shock fit?
It's a direct-fit rear replacement for the 1999-2004 Toyota Tacoma. Check the Buyer's Guide tab to confirm the application for your specific vehicle.
Is this a front or rear shock?
This is a rear position shock absorber. It is sold individually, so order two if you plan to replace both sides of the rear axle.
What is a monotube gas design?
It separates the gas and oil in one tube using a floating piston, which reduces aeration for fade-free operation and instant, responsive damping.
How much more damping does it provide?
KYB states the Gas-a-Just adds up to 25% more damping performance over original-equipment shocks, with extra damping for work, towing, and heavier tires and wheels.
What are signs my shocks may need replacing?
Common signs include excessive bouncing, nose dive, poor ride control, and fluid leaking from the shock body. Diagnose the cause before replacing.
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