| 2 SBCiD-IIIs and a GReddy Profec. They are both great boost controllers, the solenoids decent and I've had no problem with boost levels and SZ dyno tuned several times with both units. I prefer the more expensive Blitz unit for a couple of reasons... - 4 memory locations that are easily accessible vs 2 on the GReddy - Peak hold feature that shows last boost level reached and resets when you boost again, GReddy flashes the current peak boost a few times and disappears. It only saves the highest boost ever achieved, not per each time you get into it like the Blitz. I find it useful for track as I can glance at last boost level off a straight. - Controller on the Blitz is not as boy racer as the GReddy, I find the display too bright on the GReddy at night, even dimmed down. Mostly personal pref... either are good at doing the job.
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