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160 Posts
I just put the 91 octane tune on my car. The only mod I have on the car is a drop in K&N filter. I took it on a back road in our 28 degree weather and turned on the SRT pages and observed the engine stats. I floored it and watched the HP reading and I saw it hit 518hp and higher. So... is that the 28 degree weather, BS, or is this the best tuner on the planet for creating magic horsepower? Does the tune screw up the SRT page's readout of HP. I can't tell if I should be excited or feel cheated 
