KYB 5510033 Suspension Strut - Front

KYB Gas-a-Just Front Strut for MX-5 Miata

The KYB Gas-a-just 5510033 is a front suspension strut for the Mazda MX-5 Miata that restores OE monotube-style control and response. It is built for drivers who want consistent handling on the street, especially on vehicles that work harder with towing loads, larger tires, or added wheel weight.

Key Features

• OE-style monotube replacement for the front suspension
• Separate hydraulic and high-pressure nitrogen gas chambers for quick response and stable damping
• High-pressure monotube design helps maintain fade-free operation
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Higher gas pressure improves steering response
• Supports electronic safety systems by helping the suspension operate as the vehicle manufacturer intended

Product Details

KYB Gas-a-just 5510033 is engineered as a monotube strut replacement for the Mazda MX-5 Miata front suspension. The design uses an air-free hydraulic working area for control and a separate nitrogen gas chamber with a floating piston for added performance when demand increases. This setup helps restore the original handling balance of the MX-5 Miata while maintaining a comfortable ride during normal driving. This part cross-references Mazda OE numbers NA1J34700A and NC9H34700A for the same application.

Common Issues It Can Address

• Excessive front-end bounce or poor damping control
• Slow steering response or reduced road feel
• Fluid leakage from worn strut seals
• Loss of handling consistency during harder driving
• Front suspension wear that affects braking and stability systems

Installation Notes and Fitment

Compatible With 2016-2021 Mazda MX-5 Miata, front, recommended OEM replacement; Gas-a-just; (Exc. Sport Suspension).

Compatible With 2022-2025 Mazda MX-5 Miata, front; Gas-a-just; (Exc. Sport Suspension).

Verify upper mount type S1(10MM), lower mount type SPECIAL, and compressed length 15.15 in., extended length 19.48 in., and stroke length 4.33 in. before installation. Professional installation and a post-service alignment are recommended after replacing front struts on the Mazda MX-5 Miata.

Quality Assurance

KYB designs the Gas-a-just line as an OE monotube replacement to help restore factory handling characteristics and maintain consistent suspension performance.