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I started a thread on this a few weeks ago. The feedback was not the greatest, it doesn't read EGT and the people who got them were having issues with them. I have since started looking into the SCT Livewire, but after seeing Storm's pics I think it might be too big for my tastes. Now I'm back in the search for a nice set of digital guages, cause I don't want to lose my driver's grab handle, and I don't have room for any above my mirror.
You should consider the Quadzilla Commander. I use one and it has been flawless. We actually sell quit a few of them. They now have a pillar mount that lets you keep the grab handle.
We also played with the Dashawk. Not so great for the diesels, but gassers seem to like them. MSD claims in the next few months it will be more compatable with the diesel trucks.