These Stage 2 performance chips/modules from JET will improve the performance of your truck with very little work. Perfect for modified vehicles with low-restriction exhausts and lower-temperature thermostats, they've been programmed to deliver peak power increases under hard throttle conditions, such as towing and wide-open throttle. They offer a full range of DST programming of the air/fuel ratio, ignition advance, and transmission, and are fully track and dyno-tested to ensure the most possible power without affecting day-to-day drivability.