Owing to its simplistic cam-in-block design, Jeep’s 4.0-liter straight-six is known for two things: Unflappable reliability and a lack of power. Its maximum of 190 horsepower and 235 pound-feet of ...

HP Tuners is one of the leading names in the aftermarket engine tuning world, offering one of the most comprehensive tools on the market. For more than a decade, HP Tuners plug-in devices have been ...

Remember the ’07 and ’08 Jeep Grand Cherokee CRD with the 3.0L Mercedes V-6 under the hood? Don’t be alarmed if you can’t. Like the ’05 to ’06 diesel-powered Jeep Libertys, Chrysler didn’t make a ...

It is a long-standing tradition in the hot-rod community to stuff an enormous engine into a machine never designed to accept such a thing. Fewer builds approach the level of commitment to this creed ...

If you're reading this, there's a better-than-average chance you have a Mustang. And unless you're one of the eight or nine hold-outs on the superiority of electronic fuel injection, you've most ...

If you're reading this, there's a better-than-average chance you have a Mustang. And unless you're one of the eight or nine hold-outs on the superiority of electronic fuel injection, you've most ...