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Pretty cool gauge, but I haven't been using it since I moved over to the G4x and started using it's knock processing. This gauge has LEDs to show knock level, a 3.5mm jack to listen to the knock audio (IE electronic detcans) and an output signal that can be fed into your ECU. I used this with my Speeduino so I could view the knock signal in datalogs.
Includes the following
Gauge
Bosch Donut style knock sensor.
I made a little harness for it with some Dupont connectors. The knock sensor doesn't have any pins on it, but if you want I can throw some on before I ship it out, just make sure to remind me.
Also worth noting that the knock sensor will not fit in the stock location without a custom stud or drilling out the sensor. I drilled out the sensor and haven't had any issues. There were some custom studs (m10->m8 I believe) that were being sold on here as well.