I believe someone on here said there Glowshift Gauges was off around 150 degrees and something like 3-5psi boost off from there Isspro's.

i just installed my new isspro gauges (boost and pyro) this weekend and i love them i got them from genos garage for just under $200. you can find them through alot of diffrent performance dealers on here they all sell them for about the same price.

I have autometers and they work well but the Isspros definately look nicer and seem a lot smoother.