When it comes to hand-held tuners that modify the factory tune on a mildly upgraded Mopar Hemi, the Predator was the tuner of choice for nearly a decade. At the time of its introduction, the Predator ...

Now that you've looked at the peak numbers and shrugged your shoulders, take a look at the rpm points from 5,200 on down. You'll see a solid gain of 5-17 hp and up to 30 lb-ft of torque (at 2,600 rpm) ...