Getting 400 HP Out of a 4.0-Liter Straight-Six Jeep Engine Requires a Ton of Work Especially if you're not using forced induction. By Brian Silvestro Published: Sep 21, 2020 12:52 PM EDT ...

Ham and eggs. macaroni and cheese, chocolate and bacon (a new personal favorite!). Some things just naturally go together. Such is the case for Lotus and Cosworth. In 1967 when Keith Duckworth ...

Jeep's 1980s era 2.5-liter four-cylinder engine didn't have a ton of power behind it, but it was incredibly reliable, something it's still known for today.

We're rebuilding the 4.0L engine in this 2005 Jeep Rubicon Unlimited. We added new JBA headers for better exhaust flow, an Airraid throttle body spacer, and a cold air intake setup from Airaid all ...

If any engine can give a grizzled Jeeper the warm fuzzies, it's the'87-'06 Jeep 4.0L inline six. Designed by AMC and refined by Chrysler, its basic architecture was based on the '64-and-up AMC 199 ...

Over Thanksgiving weekend, I drove my 255,000 mile 1992 Jeep Cherokee 1,300 miles from Michigan to and from Virginia. It’s a vehicle whose engine I had blown up three years prior and swapped ...

About a year ago, I blew up my Jeep’s engine trying to drive through a deep mud pit. The next day, I bought a motor that had been sitting in a field for $120. Well, I just plopped that literal ...

Even the high-performance Grand Cherokee SRT, with its V8 engine generating 475 horsepower and a top speed of 160 mph, falls short of the Trackhawk's capabilities. Daily drivability is also an ...

No better way to quadruple a two-valve Jeep engine's horsepower like 20 pounds of boost and water ... which an On3 Performance 7675 turbo and an air-to-water intercooler can drive as high as 20 ...

We tested the 2022 Jeep Wrangler Rubicon 392 and it reached 60 mph in 4.0 seconds. It rocketed through the quarter-mile in 12.9 seconds at 104 mph and reached 110 mph in 15.0 seconds. The Wrangler ...

Four high-powered utes—BMW X5 M, Jeep Grand Cherokee SRT8, Mercedes ML63 AMG, Porsche Cayenne Turbo—get put to the test, because who doesn't want a 175-mph SUV?