Review on Innovative Performance Chip/Power Programmer for Nissan Altima 2.0L, 2.4L, 2.5L, and 3.5L - Enhance Fuel Efficiency, Save Gas, Boost MPG, Amplify Horsepower & Torque! by Billy Reeves

I was skeptical at first that some say it works and some say it doesn't, but I decided to give it a try. For the most part, his chip does what it says. On the first day of riding I immediately felt the difference in throttle response. On the second day it got better, even more responsive to the accelerator pedal and I felt a power increase overtaking cars on the track. I don't know how much fuel I'll save, but I'm not estimating much because it's fun. Overall, I don't know if this chip actually increases performance like the company claims, but it makes a difference for the better. So much so that my dad told me to order one for his Altima.