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Old 02-25-2013, 07:43 PM
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SBC in Jeep Wrangler - best headers

I am in process of doing a frame up rebuild on a '92 Jeep Wrangler with a conversion to install a 400 SBC that has been/is in process of being built out.

The Jeep conversion place I have been getting parts/advice from recommends block hugger headers with a Y pipe into a single exhaust. Of course the headers they sell are pricy.

There are a lot of SBC header options even within the block hugger variety so I was wondering is anyone here has advice about using block huggers with a Y pipe verses wide headers to go outside the frame. I presume if I go outside the frame I would run dual out the back.

Any recommendations on header sources also appreciated.

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Old 02-25-2013, 08:11 PM
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what size pipes do you need? or how many horse power is the 400 making? what RPM range? what do you call expensive?
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Old 02-25-2013, 08:24 PM
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The 400 is bored 0.030 over running about 10:1 basic CR with original iron heads (1970 vintage) except hardened exhaust seats. I do not have an intake yet but leaning toward the Performer 2101 with a Holly 750 CFM carb.

All that being said I am not sure what power to expect. Targeting low end torque more than high end HP. I doubt it will see more than 5,000 rpm.

The headers I have seen all appear to be either 2 1/2 or 3 inch collector diameter. The "expensive" version of the headers is about $450 for ceramic coated but there are a fair number of choices in the $150 range.
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Old 02-25-2013, 08:35 PM
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1 5/8 long tubes. $450.บบ is a very reasonable price. 3 inch collectors.Those headers would be good to 400 plus hp
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Old 02-26-2013, 06:44 AM
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i have Hedman and i don't like them at all, spark plug on the #5 pistons is hard to reach, #6 is even worse, expecially if you have them wrapped like me, no mention about burnt spark plug wires even with the heat socks, they also want short plugs because of the clearance, i'm using NGK...
Novak adapt makes a very good set with ceramic coating.
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Old 02-26-2013, 11:11 AM
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For the purpose of jeeping I would go with the block huggers and no more than 2 1/2 inch exhaust..that way I may have some success in coming home with what I started with..JMHO..

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Old 02-26-2013, 11:43 AM
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If clearance/space is an issue I woud recomend Sanderson QP1000 cast iron headers. They hug the block closer than anything else on the market and have more flow that standard block huggers. The only downfall is the price. They are a bit spendy at $375.00 in raw cast iron.
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Old 02-26-2013, 06:19 PM
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Thanks everyone, the more opinions I can get the better. I hate to be in Jeepers Creepers spot where the headers I buy I don't like.

I believe that on the Jeep Wrangler YJ that the block huggers like those from Novak are OK for space so I will probably not go to cast iron.

Any success with high temperature paint or is ceramic the only way to go. From Novak there is quite a price difference for the ceramic.
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Old 02-26-2013, 08:27 PM
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You can go to cerakote.com and get an air cure product and do the DIY deal..Also oven cure if you have an oven big enough to hold the header..Probably not the one wifey uses though..

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