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 ...
The Jeep 4.0L engine found in TJs, XJs, ZJs, and WJs is a trusty powerplant, and the '91-and-newer high-output versions make respectable power for a long time if well cared for. We recently ran across ...
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