The Yokomo YZ-501GS Steel Drive Cup is an upgrade part made for the YZ-870C gear differential, sold as a pair to replace fatigued or damaged cups. These steel cups are chosen to enhance drivetrain durability during aggressive use.
Crafted from strong steel, the YZ-501GS reduces the chance of deformation and extends service intervals compared with softer materials. It keeps the driveline more consistent under repeated stress and impacts.
Engineered for the YZ-870C layout, the drive cups slot into the differential with minimal fuss. They serve as a straightforward replacement or as part of a race-focused parts refresh.
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