Quick Header Question
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From: Morehead, Ky
Quick Header Question
I found a set of shorty headers that I'd like to get for my 86. They are listed as 87+ and designed to bolt to the factory Y, I already have a true dual exhaust and redoing it really isnt in the budget right now. I'm thinking these will fit just the same, Am I right? I can post link to said headers if needed, But I dont wanna get roasted for being tight. lol
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From: Morehead, Ky
These are the ones I'm looking at, Cheap and probably not the best I know. I'm open to others within the same price range that may be better,
https://www.ebay.com/itm/Performance...!US!-1&vxp=mtr
https://www.ebay.com/itm/Performance...!US!-1&vxp=mtr
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From: Virginia
Go to a autoparts site that sells 302 exhaust manifolds (many of the local stores do). Plug in your truck and see what the part number is. Then plug in the later model truck and see if the part number is the same. If they use the same manifolds, then they should fit. The only thing that might go wrong with this plan is if the later model manifold has a spot for the oxygen sensor. If it does, then of course it will have a different part number and mess up the research.
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From: Angier, NC
Go to a autoparts site that sells 302 exhaust manifolds (many of the local stores do). Plug in your truck and see what the part number is. Then plug in the later model truck and see if the part number is the same. If they use the same manifolds, then they should fit. The only thing that might go wrong with this plan is if the later model manifold has a spot for the oxygen sensor. If it does, then of course it will have a different part number and mess up the research.
Now if I understand right the OP has replaced the Y pipe with duel pipes that bolts to the stock manifolds.
So even if he is using duel pipes being they bolt to the cast manifolds and the headers replaced them he should be good.
The AMC car guys went thru this using Jeep shorty headers as some of the cars & v8 Jeeps shared manifolds. Most of the guys were running duel pipes, not Y pipe, and they worked.
I have not gotten that far yet on my AMC car project so the headers sit in the trunk for now and yes I have duel pipes hooked to long tube (holey) headers on the car now.
Dave ----
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From: Morehead, Ky
Go to a autoparts site that sells 302 exhaust manifolds (many of the local stores do). Plug in your truck and see what the part number is. Then plug in the later model truck and see if the part number is the same. If they use the same manifolds, then they should fit. The only thing that might go wrong with this plan is if the later model manifold has a spot for the oxygen sensor. If it does, then of course it will have a different part number and mess up the research.
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Senior User
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From: Morehead, Ky
Think is he wants to use shorty headers that are listed as a stock cast manifold replacement and bolt up to the factory stock Y pipe.
Now if I understand right the OP has replaced the Y pipe with duel pipes that bolts to the stock manifolds.
So even if he is using duel pipes being they bolt to the cast manifolds and the headers replaced them he should be good.
The AMC car guys went thru this using Jeep shorty headers as some of the cars & v8 Jeeps shared manifolds. Most of the guys were running duel pipes, not Y pipe, and they worked.
I have not gotten that far yet on my AMC car project so the headers sit in the trunk for now and yes I have duel pipes hooked to long tube (holey) headers on the car now.
Dave ----
Now if I understand right the OP has replaced the Y pipe with duel pipes that bolts to the stock manifolds.
So even if he is using duel pipes being they bolt to the cast manifolds and the headers replaced them he should be good.
The AMC car guys went thru this using Jeep shorty headers as some of the cars & v8 Jeeps shared manifolds. Most of the guys were running duel pipes, not Y pipe, and they worked.
I have not gotten that far yet on my AMC car project so the headers sit in the trunk for now and yes I have duel pipes hooked to long tube (holey) headers on the car now.
Dave ----
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From: Angier, NC
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From: Virginia
He said the later manifolds had extra holes in them for the O2 sensors, so the part number thing would not work. I didn't know if the factory put the O2 sensors in the manifolds or the y-pipe. I don't see why they would not fit though, he is just going to have to try them, and send them back if they do not fit. The only thing I have ever seen as a problem with headers on these trucks is if they are manual or auto trans.
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From: Morehead, Ky
He said the later manifolds had extra holes in them for the O2 sensors, so the part number thing would not work. I didn't know if the factory put the O2 sensors in the manifolds or the y-pipe. I don't see why they would not fit though, he is just going to have to try them, and send them back if they do not fit. The only thing I have ever seen as a problem with headers on these trucks is if they are manual or auto trans.
The o2 sensor on mine is in the manifold, Only one on the passenger side. The headers I posted have o2 provisions on each side. I'll have to plug the drivers side and I planned on adding a heated o2 on the passenger side. I looked at some long tube headers and they are listed as 80-96, so I know they will fit but will they bolt to my factory Y or did that change in 87? I cannot find any reasonably priced shorties for the 80-86 that are listed to bolt to the factory Y.
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The Speed Density EFI engines had a single O2 sensor in the Y-pipe from '86 to '95. The '96 (and some CA '95) trucks that had a Mass-Air EFI system (and OBD-II) had three O2 sensors, one in each manifold and one down near the pre-cat. None of that should matter for manifold fitment though, just plug the holes for the O2 sensors if you are not using them.
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From: Virginia
Ok, I did it. I looked up on Autozone a 1986 f150 4x4 with a 5.0 engine. The exhaust manifolds for that engine are;
Dorman 674-152 (left without heat valve)
Dorman 674-153 (right)
Dorman 674-155 (left with heat valve)
Then I plugged in a 1988 f150 4x4 with a 5.0 engine. The exhaust manifolds for that engine are;
Dorman 674-152
Dorman 674-153
So the later engine uses the same exhaust manifolds. Since the headers you want to buy replace the exhaust manifolds, they should fit correct?
Dorman 674-152 (left without heat valve)
Dorman 674-153 (right)
Dorman 674-155 (left with heat valve)
Then I plugged in a 1988 f150 4x4 with a 5.0 engine. The exhaust manifolds for that engine are;
Dorman 674-152
Dorman 674-153
So the later engine uses the same exhaust manifolds. Since the headers you want to buy replace the exhaust manifolds, they should fit correct?
Thread Starter
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Senior User
Joined: Jan 2010
Posts: 133
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From: Morehead, Ky
Ok, I did it. I looked up on Autozone a 1986 f150 4x4 with a 5.0 engine. The exhaust manifolds for that engine are;
Dorman 674-152 (left without heat valve)
Dorman 674-153 (right)
Dorman 674-155 (left with heat valve)
Then I plugged in a 1988 f150 4x4 with a 5.0 engine. The exhaust manifolds for that engine are;
Dorman 674-152
Dorman 674-153
So the later engine uses the same exhaust manifolds. Since the headers you want to buy replace the exhaust manifolds, they should fit correct?
Dorman 674-152 (left without heat valve)
Dorman 674-153 (right)
Dorman 674-155 (left with heat valve)
Then I plugged in a 1988 f150 4x4 with a 5.0 engine. The exhaust manifolds for that engine are;
Dorman 674-152
Dorman 674-153
So the later engine uses the same exhaust manifolds. Since the headers you want to buy replace the exhaust manifolds, they should fit correct?
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