Electronic conversion of tacho for TR2-6. The standard convention cable arrangement is far from accurate and can be become unreliable. The conversion to electronic internals does not change the exterior appearance of the gauge. We do not work on an exchange basis, you are required to send your gauge to us, it will be retuned 2-3 weeks later ready to fit. A must on any performance car where accuracy is critical, also required when converting your engine to electronic ignition on TR5-6. Fittings instructions are supplied.