Jeep, as the brand we know today, was first established by Willys Overland after it produced the company's Quad vehicle for the U.S. Army during World War II. In the years since, Jeep has passed into ...

There are very few things Jeep enthusiasts can agree upon. Very few. But one thing is for sure -- the4.0L, six-cylinder engine was a flat-out kick-ass engine. When the all-new '07 Wrangler debuts ...

The 4.0-liter straight-six made famous for its use in Jeeps in the Eighties and Nineties is known for many things, but power isn't one of them. It's a workhorse motor, meant to take abuse and run ...

Upon adding 33-inch-tall tires, a flexy long-arm suspension system, and enough camping essentials to forget home while on the trail, our donor's '05 Jeep Rubicon Unlimited felt a bit on the sluggish ...

Jeep’s 4.0-liter straight-six engine is iconic. Much like the Ford 300, it’s a down-and-dirty truck engine that stayed in production for decades. Also like the Ford 300, it can make a ton of power ...

Chad Golen founded Golen Engines in Lowell, Massachusetts in 1992, specializing in small block Chevy performance engines. Ten years of success allowed Golen to purchase the equipment, dynos, and ...