If you plan on increasing the horsepower output of your computer controlled engine, you’re going to need car tuning software in order to obtain the best horsepower gains. This kind of software can be purchased at your local parts store that sells performance equipment. There are also a number of places that you can buy tuning software online. Such as performance parts catalog sites. One of the most popular of these high performance parts catalog sites is JEGS, whose tuning software listing is here. Another favorite of auto tuners is Summit Racing.