Superchips Flashpaq 3874 for 1998–2014 Jeep Wrangler TJ & JK Add Power, Adjust for Mods & Unlock Full Jeep Functionality The Superchips Flashpaq 3874 is the ultimate performance programmer for 1998–2014 Jeep Wrangler TJ and JK models, including the 4.0L, 3.8L, and 3.6L engines. Designed for Jeep owners who want both power and control, this tuner delivers proven horsepower and torque gains while giving you access to the most popular Flashcal features in one powerful handheld device. Preloaded with performance tunes for both 87 octane and premium fuel, the Flashpaq 3874 provides instant improvements in acceleration, throttle response, and overall drivability, whether you’re on the road or off the beaten path. It’s engineered to make towing, trail crawling, or daily driving smoother and more responsive. Beyond raw power, Flashpaq offers complete vehicle control with features like tire size and gear ratio calibration, TPMS (Tire Pressure Monitoring System) adjustment, and Rubicon-specific functions such as locker and sway bar control. Whether you’ve added larger tires, upgraded gears, or made other mods, Flashpaq keeps your Jeep running perfectly calibrated. For Jeep Wrangler TJ and JK owners, the Superchips Flashpaq 3874 combines the best of both worlds—Flashcal’s legendary adjustment capabilities and performance tuning power—making it the go-to upgrade for power, precision, and control