are 4.0 headers interchangeable? - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 10-18-2008
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are 4.0 headers interchangeable?

according to jba 's website list same part number for the ohv and the sohc... same header fits both?
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Old 10-21-2008
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i think the EGR is deferent..
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Old 10-21-2008
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i went to jegs and got the headman headers for the 99 model ranger they bolt up the same just have to change the cats around to get them to bolt up down their and the price is a hole lot cheaper payed 226.00 for them
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Old 10-21-2008
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any noticeable performance improvement with the hedman? having a very difficult time justifying the price tag of the jba headers with probably miminal gains
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Old 10-21-2008
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With headers the peak horsepower wont be much. What they change the most is the low and midrange torque and horsepower. You don't need high RPM in a truck.
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Old 10-21-2008
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but remember you get what you pay for when it comes to parts like headers. yeah the jba are expensive, but in my mind i would rather pay for the quality than cheap out and get a set of pacesetters or something. so i'll just hold out till i can afford em.
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Old 10-21-2008
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thats what is what most is low/ mid improvement... i very rarely use high rpm ( past 4000)
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Old 10-21-2008
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and i'm pretty sure they are the same bolt pattern, just they moved the EGR around or you don't have it depending on the year. so as long as you get the EGR on the correct side you should be fine. unless they changed the bolt pattern for the EGR. (don't know if they did or didn't) thats about all i know
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Old 10-21-2008
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will have to check to use if/ where my egr is... pain getting to spark plugs after?
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Old 10-21-2008
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couldn't tell ya. i'm sure its no harder than what it already is. looking at my 03 it shouldn't change anything they sit above the exhaust.
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Old 10-21-2008
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reading a forum on ranger station..op looking for gains in same area as me, granted on the sohc...recommended he keep stock size exhaust for velocity and change the headers..from sound of it the stock ohv manifold are more restrictive than the sohc ones so hopefully more dramatic gain in my case anyways
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Old 10-21-2008
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Quote:
Originally Posted by ringer4x4 View Post
according to jba 's website list same part number for the ohv and the sohc... same header fits both?
OHV header isnt listed as the same.

OHV 98-2000: W/EGR 1634S-3 W/o EGR 1634S-2

OHV 97-older: 1634S

SOHC: W/o EGR 1674S-2 W/ EGR 1674S-(1)
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Old 10-21-2008
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Quote:
Originally Posted by redranger4.0 View Post
OHV header isnt listed as the same.

OHV 98-2000: W/EGR 1634S-3 W/o EGR 1634S-2

OHV 97-older: 1634S

SOHC: W/o EGR 1674S-2 W/ EGR 1674S-(1)
can't find it now but first time visited their site they listed them together... should've cut/ paste link at the time
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Old 10-22-2008
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the headers i have are great never had any problems out of them cause they were cheap!! its the same size pipe as jba and gibson there just for a 99 model ranger you have to mod the flange on the cat a bit to get them to bolt up to a 00 model i don;t know what kind of hp gains i got from them but they made a difference
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Old 10-23-2008
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What kind of headers did you get?
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Old 10-25-2008
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Headman
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