Can I use the Blitz dual tt as a boost gauge only or do I have to hook (wire) up the turbo timer? Do I need the wrx specific wiring harness to do this install? I just wanted a economical boost gauge with peak hold function. Thanks.

 

i think you have to connect all the wires in order for the gauge to work. im not too sure though. the harness just makes everything easier. itll be plugnplay instead of finding the right wire to tap.

 

Thanks ScoobyBoy. I'll try it with the harness.