Superchips 3875 Flashpaq for Jeep 4.0L TJ, 3.8L JK, 4.7L, Hemi 5.7L and 5.9L Superchips exclusive crawl off-road tune Tire size calibration of speedometer available on properly equipped Jeeps Tire size calibration of speedometer available on properly equipped Jeeps Industry leading horsepower and torque gains Read and clear diagnostic trouble codes