Blitz Timer Harness 85-91 Mazda RX-7 (FC3S) - P/N: 51250 Product Model: BZ-51250 Timer Harness For most makes of Japanese sports cars there is a wiring harness available to aid fitment of Blitz turbo timers. The harness simply plugs into the ignition loom making all the necessary connections between the turbo timer and the ignition; this means that no soldering or crimping is required.