Technical Hot Rod Style 'Rams Horn' Exhaust Manifolds

I have a question I need help with, please?

What adapter (s) gaskets are supposed to used to bolt a pipe into these manifolds?

I took one manifold to a local bend 'em up exhaust place. They said they never seen this type of exhaust pipe to manifiold mounting before, and have no idea the correct way to mate a pipe to the manifold w/o it leaking. Took the manifold to a huge exhaust pipe supplier place about 25 miles north of me. They said, Oh, simple, use a "header flange." I was confused, because a "Header Flange" to me is the flat piece of steel the header tubes weld to, and then all that bolts to the side of the head. I tried to ask what he meant by the "header flange", and how does it bolt to these manifolds? He just kept repeating "Header Flange" it's not rocket sicence.

So, any of you guys have a clear picture of what I am supposed to use? Thanks

 

i used header flanges a

 

One side of the car used a donut gasket (the bevel). The other side had the heat damper (the flat side).

 

Some people call them header reducers

 

Since you call them "hot rod style" manifolds, that implies that they are not original...or am I mistaken?

If they are original Chevy rams horns, then the fitting is kind of complicated. There's a donut, but also you need a tube that fits into the donut, and the pipe is swedged to have a flare that fits against the angled outside edge of the donut. And getting the correct size donut can be difficult. And then you need the flange that is bolted to the manifold, and forces the flared pipe against the donut.

if you get it wrong, it will not last long!

pictures are a really big help so we can see what exactly you have to work with.

 

First, pics would help. Hot rod style isn't OE or a brand name, rams horn is commonly SBC but could be ford, too.
Second, you could have bought what the guy was selling at the second place, or at least asked him to show you. You are providing less info to us than what the experts got.

@alchemy has you covered IF it's SBC and IF they retained OE style outlets.
https://www.ecosia.org/images?q=sbc exhaust manifold to pipe gaskets

 

I just had an exhaust done using the Speedway Tru Rams. The exhaust fabricator used a flat 3 bolt flange bolted on with the right size tube stuck inside and tacked. I've got the same manifolds on my roadster and tudor sedan, no problems.

 

I have a set of ram horns that have just a smooth pipe outlet . I thought I would just weld/braze a pipe to it. someone thought they were for the C2 corvette?

 

Polished and ceramic coated?

 

This is a picture I quickly found. Mine are shaped like these, but are raw cast iron. Not plated like these pictured.

So you guys are saying, to get a very short piece of exhaust tubing, expanded to snugly fit in that recess pictured. Take a 3 bolt flange plate and gasket, fit and bolt everthing together, then TIG weld the 3 bolt flange and short pipe together?

Are those 3 bolt flange plates and gaskets readly availible, or is it something I will have to get "water jetted"?

Any other ideas for a "simple" joint that will not leack?

Thanks for the ideas.

 

Search exhaust header flanges, you will find many available from different sources.

 

Those appear to be Speedway's smooth rams horn manifold. They come with flat copper gaskets for the outlet and copper gaskets for the head connection. Should be able to get gaskets from them. The outlet connection is a flat flange.

 

no gasket needed. if you want a gasket, use red hi temp silicon sealer. race
cars use red hi temp

 

you should just need something like this



The exhaust shop should be able to make them, if they have the flanges in stock.

 

How about these? there are others too with different pipe sizes.

https://www.ebay.com/itm/1669211043...r4A5HCD/5GBKa/hjLuGvuDtvM=|tkp:Bk9SR-K58em-ZQ

 

My block huggers use the type shown by squirrel above.
The copper gaskets will last a long time if the bolts are kept tightened.

I now have whiz bolts in addition to whiz nuts to discourage loosening from heat/cool and vibration.

 

Never heard the terms whiz bolts and nuts. Care to explain or post a picture?

 

No, I did not get them from Speedway. I got them from a buddy. They were still sealed in the plastic bag, only the threaded studs, nuts and lock washers, plus some weird kind of exhaust manifiold gaskets were in another bag inside the bag the manifolds were in.

 

Yes, I too would like to know what a "whiz" nut and bolt is? I'm getting a mental picture of something Mad Don Martin would draw.

 

Looks simple enough. Wonder why the local exhaust bend 'em up place I went to first didn't know that. I installed tube headers only on one vehicle in my lifetime, so I don't have vast header hardware knowledge.

 

C3 Corvettes used this method:

This is for the pass side, for the dr side they eliminated the heat riser and it's gasket.

 

So, the pictures above of some other manifolds might not be what you have?

If you want useful info, you have to provide more info to us.

Take pictures of what you have, so we can see. There are a lot of different manifolds out there for Chevys, and maybe the ones you have are not what we think. But we can only guess...until you show us with pictures.

 

Here's a whiz nut. Available at Ace Hardware.
https://www.mscdirect.com/product/details/67483644?gQT=1

https://www.minerallac.com/flange-whiz-nuts

 

More whiz info here:

Whiz-Lock

On May 22, 1959, John MacLean III filed a patent for his concept for “Fasteners Having Toothed Bearing Surfaces”. Tragically, John did not survive a plane crash in 1962, but he was able to see the initial success of his “Whiz-Lock” idea.

Today, “Whiz-Lock” is one of the most famous brands/terms in the fastener world and is a product now copied by nearly every fastener manufacturer in the world. Original Whiz-Lock nuts are still manufactured at our Mundelein, Illinois factory.

 

He's talking about an header reducer, that bolts to a collector.

 

If you don't show us what you actually have to work with, we're just shooting in the dark.

 

Other than the shiney coating. Those manifolds I posted a picture of are IDENTICAL to what I have.

 

Other than the shiney coating. The manifolds I posted the picture of are IDENTICAL to the ones I have the question about.

 

THANK YOU for all the replies and suggestions! I now know what to make, buy, to get a pipe to seal, (not leak) in these manifolds. Thanks again.