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Old 03-03-2012, 11:06 AM   #1
02_Sahara's Avatar
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Intake manifold 02 4.0

I'm looking for input, suggestions, pros/cons on witch after market intake manifold I should get for my jeep and what would work best with what I already have. Just put in a banks monster exhaust. I have the banks turbo tube headers and cat ordered there's a airaid throttle body spacers and a offroad cold air intake...... Any help would be greatly appreciated

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Old 03-03-2012, 05:13 PM   #2
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I don't think there are any aftermarket intake manifolds for 4.0L unless they are custom built by small companies from a stock one. If anyone does know of an after market one that is somehow better than the 99+ I would love to know.

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Old 03-03-2012, 05:21 PM   #3
Knows a couple things...

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Personally, I wouldn't bother or waste my time and $$$ on any of that. You will see minimal, if any, improvment. The 4.0L barely responds to any such add-ons, it is a very basic old-fashioned OHV straight-six that just isn't going to go easily towards being a performer. You can't make a silk purse out of a sow's ear.
When you have a choice, buy American.

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Old 03-03-2012, 07:25 PM   #4
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Jerry is right on the money, as usual. If it will make you feel better, your 4.0L Jeep's "horseshoe" intake manifold is seen as the best one ever made; it is believed to flow better than the older "log" style intake it replaced. (When this intake debuted, Jeep did indeed up the horsepower rating of the engine... though there were also other changes made besides this new intake manifold.)
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My fleet: 91 Miata, 98 Wrangler Sport, 01 Suburban 8.1L, 14 Impreza, 03 Protege
Jeep mods: 4" longarm + 1" BL, 35" KM2s, 4.56s with dual ARBs... and lots of scratched armor
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