This damper spring is supplied as a replacement part for Kyosho Mini-Z AWD cars, suitable for MR-03 AWD style shock assemblies. It replaces the factory spring to adjust suspension feel while leaving shock bodies and pistons intact.
Installation is approachable for hobbyists: remove the wheel and separate the shock, decompress the unit to reach the spring, replace the spring and reassemble. Work with small hand tools and double-check spring seating to prevent travel restriction.
Used as a tuning element the spring influences vertical stiffness and the initial response to inputs. Different spring characteristics will affect ride height, initial grip and mid-stroke support on AWD Mini-Z platforms, so test changes incrementally on a known surface to dial handling.
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