If you've ever been disappointed by the horsepower figures coming from your Jeep Wrangler JK, whether it has the 3.8-liter or the 3.6-liter V-6, and you've considered an LS swap, you're not alone.

A modified 1981 Jeep Scrambler pairs classic styling with a 400-plus-horsepower LS V8 and Tremec five-speed manual.

Even with the Poison Spyder heat-reduction hood insert throwing hints your way, it’s not easy to know that lurking under the hood of Mike Zeko’s 1998 Jeep Wrangler TJ is a whole lot more power than ...

I'm planning to retrofit a late-model LS engine into my 2002 Jeep 4x4, and want to fabricate my own exhaust headers. It needs to conform to California emissions standards. I don't want ugly "smog" ...