505 Performance
Home of the most powerful inline Jeep engine in the world! Second to none! 692 hp...  780 ft pounds of torque.
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JP magazine NOV 2009
Rolling Power The Jeep inline-six has the dubious notoriety of being the last engine built for an emissions-controlled vehicle with a flat-tappet cam. Roller cams offer faster and potentially more valve opening which translates into power by getting more air and fuel into the combustion chamber. The roller lifter also reduces friction, which can free up even more power. Finally we can get a roller cam for our '91 and up 4.0L engine. The company claims up to a 50hp increase over stock, depending on additional modifications. Information: 505 Performance, 505/333-2600, 505performance.com
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