Review on 🚀 Innovative Performance Chip/Power Programmer for GMC Terrain 1.5L, 1.6L, 2.0L, 2.4L, 3.0L, and 3.6L - Enhance Fuel Efficiency, Save on Gas & Boost MPG, Amplify Horsepower & Torque! by Jeffrey Bush

I would like to give this product less, but that's not an option. As someone who has installed some of these in other cars and gotten really good results, I have to say this product is rubbish, I actually get less mpg than before installing it. shows you that you still make things better by doing them by hand (cold air intake)