Review on Increase Fuel Efficiency, Save Gas, and Boost Horsepower with the Innovative Performance Chip/Power Programmer for Toyota Tundra 3.4L, 4.0L, 4.6L, 4.7L, and 5.7L by Scott Gamache

The product was installed according to the instructions but did not work. I contacted the company through Revain and they replied and suggested I disassemble and reinstall the product. After following the steps to disassemble and reinstall the product, no increase in fuel consumption per gallon was noticed as the product description makes clear. The company has yet to respond to any of my many requests for help. This product didn't work for me right away.