Manufactured in China, Focused on Custom Coilovers for Cars & Racing

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Engineered for the Track
Built for the Street

Precision dampening. Custom spring rates. 100% tailored.

Track‑Proven Performance

Our coilovers undergo rigorous testing on professional circuits. Real‑time damping adjustments give you the edge when every millisecond counts. Developed with input from professional racing teams.

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"The custom valving transformed my track day experience. J-PLUS delivered exactly what I needed."

— Alex R., Pro Drifter

"Perfect fitment, incredible support. The coilovers are race-ready right out of the box."

— Jamie T., Time Attack
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Custom Coilover Lineup

Coilover

Pro-Street 1

Fully customizable spring rates, mono-tube damper, 32‑click adjustment. Tailored for your chassis and driving style.

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Racing Coilover

Racing Pro

External reservoir, high-speed/low-speed damping, extreme heat management. Designed for endurance and sprint races.

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Air Suspension

Air Master

Intelligent air suspension with app control, custom valving, and perfect stance without sacrificing handling.

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Real Reviews, Real Performance

"J-PLUS made my car feel planted on every corner."

— Mike S.

"Custom tuning support is unmatched. Best upgrade ever."

— Sarah K.

"From street to track – flawless transition."

— D. Lee

Factory Strength

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In‑House CNC

German machining centers ensure micron precision.

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Dyno Tested

Every damper validated on custom dyno for consistency.

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ISO 9001

Strict quality control from raw material to assembly.

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R&D Partnership

Collaboration with GT teams to push technology.

OEM Customization Request

Supporting personalized customization of damping, spring rates, and appearance coating
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