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Old 05-03-2023, 04:23 PM   #1
slammed48
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Hooker exhaust manifolds (will they fit?)

Has anyone tried to fit the Hooker exhaust manifolds on a 73-87 sbc with factory engine mounts?

I'm hesitant to order them before confirming.

The part number is 8525HKR and here's a picture for reference of the ones I'm referring to. Thanks
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Old 05-03-2023, 06:38 PM   #2
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Re: Hooker exhaust manifolds (will they fit?)

They fit on mine. 75 C10, 350/TH350. Stock mounts. Bought a set after seeing them mentioned in a different thread on this forum. They replaced a set of worn headers. I was tired of leaks.

I went with the uncoated version. They have ceramic coated version but the break in instructions mention a requirement for several short (less then 5 minutes) runs. I live about 40 minutes from the exhaust shop that did the tie in from the new manifolds to the existing exhaust pipes that were still in good shape.
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Old 05-04-2023, 06:48 PM   #3
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Re: Hooker exhaust manifolds (will they fit?)

I think they look pretty nice.
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Old 05-05-2023, 06:43 AM   #4
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Re: Hooker exhaust manifolds (will they fit?)

A friend of mine is putting them on a truck build, and after seeing them, was pretty impressed. I was most concerned about the 2-bolt flange, but those flanges are big and beefy. I think Hooker did a nice job on em. I'll be replacing the crappy headers the PO installed on my truck pretty soon I think.
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Old 05-06-2023, 07:32 AM   #5
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Re: Hooker exhaust manifolds (will they fit?)

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Originally Posted by rick1956 View Post
I was most concerned about the 2-bolt flange, but those flanges are big and beefy.
What's the concern with 2-bolt flanges? Cracking, or leaking?

I'm installing OEM 2010 Camaro manifolds on a LS-build of mine, and they come with 2-bolt flanges as well. I just wondered if there's more that I need to watch out for than I thought.
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Old 05-06-2023, 09:37 PM   #6
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Re: Hooker exhaust manifolds (will they fit?)

The concern was basically 'one less fastener'. I'm used to seeing manifold collectors be tri-way instead of only two fasteners. It was just different, and you know how people are with change...
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Old 05-07-2023, 12:20 AM   #7
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Re: Hooker exhaust manifolds (will they fit?)

Had a decent day for outdoor pictures. Installed on my 75 C10 with 350/TH350. Easily clears both motor mounts and frame. Like others have mentioned, the 2 bolt connection did cause some worry but I have seen several OEM setups using 2 bolts. Good time to check all of your exhaust hangers if you are reusing much of the existing system.
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Old 05-07-2023, 08:27 AM   #8
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Re: Hooker exhaust manifolds (will they fit?)

Do they need custom pipes to connect to them or will stock exhaust pipes work and just change the flanges?
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Old 05-07-2023, 01:22 PM   #9
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Re: Hooker exhaust manifolds (will they fit?)

The pair of included flanges are setup for 2.5" pipes to be welded to the flange. The flange + pipe then bolts to the manifold and is sealed with a flat gasket. In my case, since I was switching from headers, it needed about a foot of pipe on one side and about three feet on the other. The shop charged just over $100 for the job. My existing pipes are 2.25" and were in good shape despite being 25 years old.
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Old 05-07-2023, 02:03 PM   #10
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Re: Hooker exhaust manifolds (will they fit?)

Those look nice. Can you use heat sheilds with them?
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Old 05-07-2023, 10:35 PM   #11
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Re: Hooker exhaust manifolds (will they fit?)

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Those look nice. Can you use heat sheilds with them?
If you are talking about the OEM shields, don't know. Those vanished when I put on the headers back in the mid 90's.
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Old 05-10-2023, 04:05 PM   #12
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Re: Hooker exhaust manifolds (will they fit?)

Yes sir we are running them on two square bodies in our fleet.
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Old 05-12-2023, 07:16 AM   #13
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Re: Hooker exhaust manifolds (will they fit?)

Bought myself a set yesterday. I included these header pipes with mine--overpriced or not. I just want good mating flanges... the exhaust shop can take it from there.
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Old 05-12-2023, 11:17 AM   #14
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Re: Hooker exhaust manifolds (will they fit?)

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Bought myself a set yesterday. I included these header pipes with mine--overpriced or not. I just want good mating flanges... the exhaust shop can take it from there.
They don't look like they have enough bend for that manifold that exits straight down. Are they made for these manifolds?
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Old 05-13-2023, 11:36 AM   #15
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Re: Hooker exhaust manifolds (will they fit?)

Yup, the flanges exit the manifolds at angles... they're made for em. I'll let you know how they fit when it's all said and done!
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Old 05-21-2023, 07:53 PM   #16
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Quote:
Originally Posted by rick1956 View Post
Bought myself a set yesterday. I included these header pipes with mine--overpriced or not. I just want good mating flanges... the exhaust shop can take it from there.
Thanks everyone! I finally received my back ordered pair of these manifolds (Havenít even opened the box yet).

And Rick1956, that would be great to hear how those pipes work out for you and, if you donít mind sharing where you bought them.
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Old 05-21-2023, 08:23 PM   #17
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Re: Hooker exhaust manifolds (will they fit?)

Three pics of the pipes the exhaust shop made for my switch from old headers to the Hooker manifolds. The 90 degree bend continues as the longer pipe in the pic with both. The blurry one is the end of the new passenger side pipe.
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Old 05-22-2023, 09:14 AM   #18
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Re: Hooker exhaust manifolds (will they fit?)

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Thanks everyone! I finally received my back ordered pair of these manifolds (Havenít even opened the box yet).

And Rick1956, that would be great to hear how those pipes work out for you and, if you donít mind sharing where you bought them.
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Bought mine at Supershops. I still haven't received the manifolds yet, but that doesn't surprise me--everyone seems to have a waiting list for them. Good price on t-shirts at Supershops too btw... haha
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Old Yesterday, 07:09 PM   #19
slammed48
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Re: Hooker exhaust manifolds (will they fit?)

Rick1956- any chance you have a link to those header pipes? I couldnít find them on the site.

I got my hooker manifolds and they do, as others have said, look like theyíre gonna fit, so I painted them with the Eastwood exhaust coating todayÖ
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