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

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.

Re: Hooker exhaust manifolds (will they fit?)
 

I think they look pretty nice.

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.

Re: Hooker exhaust manifolds (will they fit?)
 

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.

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...

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.

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?

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.

Re: Hooker exhaust manifolds (will they fit?)
 

Those look nice. Can you use heat sheilds with them?

Re: Hooker exhaust manifolds (will they fit?)
 

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.

Re: Hooker exhaust manifolds (will they fit?)
 

Yes sir we are running them on two square bodies in our fleet.

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.

Re: Hooker exhaust manifolds (will they fit?)
 

They don't look like they have enough bend for that manifold that exits straight down. Are they made for these manifolds?

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!

Thanks everyone! I finally received my back ordered pair of these manifolds (Haven’t even opened the box yet).

And Rick1956, that would be great to hear how those pipes work out for you and, if you don’t mind sharing where you bought them.
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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.

Re: Hooker exhaust manifolds (will they fit?)
 

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

Re: Hooker exhaust manifolds (will they fit?)
 

Rick1956- any chance you have a link to those header pipes? I couldn’t find them on the site.

I got my hooker manifolds and they do, as others have said, look like they’re gonna fit, so I painted them with the Eastwood exhaust coating today…
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Re: Hooker exhaust manifolds (will they fit?)
 

Well, I finally got all my parts and was able to play with the fit. My assessment: the head pipes I mentioned do not fit.

The good news is, the quality of materials is excellent in them, so rather than send them back I am going to customize (butcher) them and use them anyway. The flanges look too nice to pass up.
Time to get the welder out!

Re: Hooker exhaust manifolds (will they fit?)
 

Can't you get them bent a little more?

Re: Hooker exhaust manifolds (will they fit?)
 

I finally finished 3 days worth of cutting, fitting, and welding after putting my new manifolds in. The fit on the manifolds is phenomenal (but as everyone knows, exhaust work is always 'one thing leads to another' etc). Lots of room on all sides, perfect bolt placement and sizing, and plenty of room for spark plug access--possibly even slightly better than stock. They're beefy and heavy too. I smeared Calyx all over them to keep them from looking like a saltwater attack the first time it rains.
I ended up buying Hooker headpipes to ensure a good fit with the manifolds, but as I stated earlier, they did not fit. They did, however, furnish me with perfect, beautiful flanges to use after a little butchery. It felt somehow sacrilegious cutting them up but I figured, if Hooker sold only the flanges with a short length of straight pipe on them they'd probably be over a hundred bucks anyway. So, a shoulder-shrug later I had the saw out.
I opted for an H-pipe and the longer Magnamufflers to keep everything quiet. The current sizing is 2 1/2" all the way to the rear of the mufflers, where I tied into the 2 1/4" OEM tailpipe. I'm really happy with the sound!

Re: Hooker exhaust manifolds (will they fit?)
 

Nice! It’s helpful to know the head pipes aren’t gonna work as is, so I can plan accordingly.

I’ve finally terminated my plug wire ends. I’m happy with it.

I coated my manifolds with Eastwood exhaust coating.

The only gripe I have regarding the manifolds so far is that one of the bolt heads would not fit without me grinding the manifold slightly.

Re: Hooker exhaust manifolds (will they fit?)
 

Been running them for a good 6 months now. I got the black ceramic ones. Built a new y+pipe, magnaflo high flow converter and muffler on a single 3 inch exhaust. System turned out excellent with the exception of the lousy POR 15 hi-temp paint.

Re: Hooker exhaust manifolds (will they fit?)
 

awesome! I still haven't had a chance to do the rest of the exhaust on mine. My goal is to quieten it as much as possible, and I've considered running a catalytic converter and single exhaust as well, but obviously it's easier to just run two pipes out the back than the y pipe.


No chance you have a sound clip of it running, huh?