This spring cup is an RC-scale damper accessory designed to sit under the shock spring and shift the spring mount 2mm lower than the stock location. Machined from blue anodized aluminum, it provides a stable seating surface for longer shock springs commonly used in drift setups.
Because the part lowers the spring perch, it helps accommodate extended-length springs such as Swift 2mm long shock spring (YS-2DL5?2, 980) series without altering the damper body. The part ships as a pair to cover both front or both rear dampers depending on your tuning needs.
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