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Racepak V300SD Data Logger Door Car Kit, Serialized 200-KT-V300SD1S 2021-acura-ilx-esi2356557 you need to have oneV300SD with Door Car Harness. Commonly used for Pro Stock, Pro Modified, Sportsman drag race classes and Land Speed. Comes with DataLink software. Racepak V300SD Data Logger Door Car Kit, Serialized 200 KT V300SD1S Specifications: Application Drag Racing Brand Racepak Category Gauges and Gauge Accessories Emission Code 5 Harness Style Door Car Battery Ignition Type Battery Ignition Operating Voltage 12 18 volts Product Type Data Loggers Start Record