HYP458231 / 458231 - Application Notes Many Ford computers do not contain a replaceable engine tuning chip. That is why Hypertech engineers designed the Power Module for Ford cars and trucks. The Power Modules aluminum housing contains a dyno-tuned Power Chip that is mounted on a circuit board that easily plugs into the Ford computer's service port. The Power Module electronically disconnects the stock chip and replaces it with the Power Tuning information stored in the Hypertech Power Chip. The Power Module delivers the same performance benefits as other Hypertech Power Tuning products. Spark timing and fuel delivery are optimized for your engine, point-by-point, over the entire RPM range at full throttle. This produces the most powerful horsepower and torque curves possible. Ford Power Modules deliver more horsepower, higher torque, faster acceleration, and improved throttle response. Actual product may vary slightly from image.