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 ...

Many old-school tuners and hot rodders know their way around a carburetor and distributor. They also know today's technology enables better performance and gas mileage than we ever imagined. I'll ...

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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) ...

The 5.7 HEMI is one of the most recognizable and celebrated American engines ever made. It's a beast of a power plant, with up to 395 horsepower and 410 lb-ft of torque on tap — right out of the box.