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I thought that the SG and most other gauges were supposed to do well with checking aero mods, but not engine mods where you would want a mpguino.
I didn't a-b-a mine, aside from the amount of work to pull and reinstall, I think the cool down time and changes in weather could have impacted results. I did a lame a-a-b to have a better guess if I should even keep it. Compared to some previous runs it looked like was worth somewhere between 2-4.5%. Think it was about $10 for the paver edging, and another $10 in 1/4" hardware
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