Note: "Bottoming out" of a spring coil upon coil even once will hasten it's deterioration. Avoid using 3 shims if the "bottoming out" condition should result.
Helps raise engagement rate. 1 washer raises engagement 100 RPM. Use 1, 2, or 3 washers. Fits 102C, 108C, 108EXP, and 108 4-Pro clutches.