Better MPG
#16
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Join Date: Jan 2010
Location: Mt. Iron, MN
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Year: 96 Limited ZJ
Model: Grand Cherokee
Engine: 5.2 w/mods
Look at the factory down pipes. Those are the best thing to change. The one side has a crush part in it that is only about 1-1.5". We lose most of our power there. Headers are a good upgrade but they are spendy and hard to find for the ZJ. A good alternative to that is the 92-93 Dodge 5.2/5.9 manifolds. They are bigger than our stock manis and bolt right in. 2.25" manis to a true 3" Y and 3" all the way out back with hi flow cat and choice of muffler is the norm for exhaust on the 5.9s.
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