Better MPG

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04-07-2012, 09:51 PM

#16

country_boy454

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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

Quote:

Originally Posted by BKJeep

Anyone replace their single exhaust on the 5.9?

I would have to believe that the single exhaust robs the jeep of better mpg and additional hp. Curious to know if someone has already done it, and how was the outcome?

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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04-07-2012, 09:59 PM

#17

E-Rok

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Location: Everett, WA

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Year: 1996

Model: Grand Cherokee

Engine: 5.2L

lol mpg's

im lucky to get 13mpg with 33's

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04-08-2012, 09:47 AM

#18

alexallen86

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Location: green bay WI

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Year: 2001

Model: Grand Cherokee

Engine: 4.7

Quote:

Originally Posted by E-Rok

lol mpg's

im lucky to get 13mpg with 33's

What engine

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04-08-2012, 11:49 AM

#19

E-Rok

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Year: 1996

Model: Grand Cherokee

Engine: 5.2L

Quote:

Originally Posted by alexallen86

What engine

5.2

I got around 16 mixed with stock tires, not much less with 31's. I dont have a real accurate reading for 33's because my speedo is off so its a guess

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