This ultra soft lower A-arm spring is intended for front suspension tuning on Yokomo R12 and related GT-series cars. The design reduces initial spring rate at the lower arm to soften the front feel while keeping suspension geometry intact.
Use the spring to enhance mechanical grip where traction is limited; the softer characteristic smooths weight transfer and can reduce snap steering. For consistent results, rework damper settings and ride height after installation.
Installation is straightforward on compatible R12/GT lower A-arm mounts: swap this spring in place of the original and verify full-travel clearance. Recheck preload and damping to restore balanced handling.
Compatibility: GT5-R35, GT5-SC430, GT3-REA, GT3-IS350, GT3-B4, GT3-CAX, GT3-BRZ, GT3-AHP, GT-B, GT5-R2, GT5-RS2, YR-R12C3, YR-R12C31.
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