Jeep Wrangler 4.0L 96-04 Power Programmer III - Increasing horsepower and torque is as simple as pushing a button with Hypertech's Power Programmer III! You simply plug the Power Programmer into the underdash diagnostic plug, answer a series of "Yes/No" questions, and the Power Programmer does the rest. Depending on the application, atleast 8 to 10% power gain can be seen. On some applications a dramatic improvement of up to 18% has been reported. When you connect the Power Programmer to your vehicle, its "smart" program instantly recognized your vehicle's powertrain by reading its Vehicle Identification Number (VIN). The VIN contains specific information on the engine, transmission, and drivetrain, which the Power Programmer decodes before it downloads the Power Tuning program that is precisely tailored to your car or truck. The Power Programmer is incredibly powerful, but it is also incredibly easy to use. Reprogramming does not require any tools or knowledge of cars or even computers - plus you can return to OEM stock programming in just minutes. - $399.99

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