FORCE tuning coupling-backen. Description: This tuning part has weight-optimised coupling shoes Owing to the specially worked out shape of the coupling jaws these also possess a larger contact surface at the inner side of the clutch bell. Thanks to these modifications this coupling engages only at high speeds & the model is accelerated abruptly & powerfully. Included in delivery. 3 coupling-backen. 3 Springs. Specification: Aluminium. Intended use Spare part. Suitable for FORCE 3-backen-tuning coupling (234957-62).