2005 Tundra

It's a good way to dispose of a lot of cash but I wouldn't expect much from it. The dual exhaust would help if you didn't have the converters to deal with but unfortunately, you do. The rest of that stuff just makes money for the people that sell it. Although the computer chip can change the operating program, it can't give you both power and fuel mileage. They just contradict each other and any changes like that would be against federal law to do on vehicles driven in the US.