allpar.com http://www.allpar.com/mopar/40.html "The Jeep 4.0 liter PowerTech Straight-Six Engine" bringing the horsepower up to 190 from the original 170 4.0 aka 242 "The Jeep 4.0 liter PowerTech Straight-Six Engine" Allpar's 4.0 page Allpar's 4.0 page