Dynomax headers
Senior User
Joined: Jan 2000
Posts: 238
Likes: 0
Dynomax headers
I am going to get some headers for my truck, and from what I have read the dynomaxs have a slip joint on one side. I dont like that idea a lot, but they are in my price range. They also have a Jet-Hot coated version, do these have this slip joint? Right now I am thinking I should save up a bit more and get some Hookers. What other brands have you guys had experience with. Im not trying to debate if manifolds or headers are better here, they both have there advantages.
Dave
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Dave
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Cargo Master
Joined: Jul 2000
Posts: 2,281
Likes: 18
From: Northern California
Dynomax headers
I run the Hooker super comps because that's what came with the truck. The fit well and look to be a great design. I had to oblong the bolt holes to get them to match perfectly to the exhaust on my 428, but that might be because I ported the heads. On a side note, I have been able to remove and install the stock starter without dismounting the engine and only had to dismount the header. I'd find out just how thick the flang is and look at the tube design.
When I looked close at the Hookers, you could tell that they spent some time looking at the FE port design, the bends are good and I'm guessing they would be one of the better ones for performance. If you can get a picture of the Dynomax, compare the tube layout, they may have copied Hooker and that would save you some money. Let us know what you do, it's nice to have the scoop on what works best.
When I looked close at the Hookers, you could tell that they spent some time looking at the FE port design, the bends are good and I'm guessing they would be one of the better ones for performance. If you can get a picture of the Dynomax, compare the tube layout, they may have copied Hooker and that would save you some money. Let us know what you do, it's nice to have the scoop on what works best.
Senior User
Joined: Oct 2000
Posts: 219
Likes: 0
From: Richmond USA
Dynomax headers
I am using the Dynomax Ceramic Coated Headers on the 460.
They do have the slip joints, exhaust pipes fit over the joint
tight before clamping. Does not show to be leak at the joint.
Ceramic coat is holding up rather well.
Had them on the truck for about 1 year now.
Dre'
1978 F-150, 460ci(750cfm,Edelbrock Performer,Dynomax Ceramic Coated headers,etc.)Auto-C6,3:70.1 - 9" Posi.
They do have the slip joints, exhaust pipes fit over the joint
tight before clamping. Does not show to be leak at the joint.
Ceramic coat is holding up rather well.
Had them on the truck for about 1 year now.
Dre'
1978 F-150, 460ci(750cfm,Edelbrock Performer,Dynomax Ceramic Coated headers,etc.)Auto-C6,3:70.1 - 9" Posi.
Senior User
Joined: Oct 2000
Posts: 219
Likes: 0
From: Richmond USA
Dynomax headers
Slip Jount is: Instead of the bolt-on flange at the end of
the header pipes the end are smooth so you slip the exhaust
over the end of the headers.
Dre'
1978 F-150, 460ci(750cfm,Edelbrock Performer,Dynomax Ceramic Coated headers,etc.)Auto-C6,3:70.1 - 9" Posi.
the header pipes the end are smooth so you slip the exhaust
over the end of the headers.
Dre'
1978 F-150, 460ci(750cfm,Edelbrock Performer,Dynomax Ceramic Coated headers,etc.)Auto-C6,3:70.1 - 9" Posi.
Trending Topics
Lead Driver
Joined: Nov 2000
Posts: 6,619
Likes: 340
From: Albuquerque
Dynomax headers
I've been running a set of Cyclones for years. Recently had them ceramic coated. Probably have 140,000 on them. I think there a made by Headman.
1977 Ford F-100
400m/c6
280,000 miles
Stock on the outside
modified/rebuilt everything
1977 Ford F-100
400m/c6
280,000 miles
Stock on the outside
modified/rebuilt everything
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Senior User
Joined: Jan 2000
Posts: 238
Likes: 0
Dynomax headers
I was reading in some posts i found searching, and the guy said there was a slip joint on one of the pipes and it goes around a crosmember or something, Im not sure, thats why Im asking. If anybody has a picture of the Dynomax headers, I would like to see them. If they dont have that slip joint, im definetly going to get them because they are only 103.99 and have a $25 rebate right now.
Dave
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Dave
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Senior User
Joined: Jul 1999
Posts: 154
Likes: 0
From: Relocated to San Diego CA
Dynomax headers
I've got the Dynomax headers for my 71 2wd, with a 302. They have a flange connector. I don't know how long they last, I haven't fired up the engine yet.
Chris
In the land of the blind, the man with one eye is king.
Chris
In the land of the blind, the man with one eye is king.
Fleet Mechanic
Joined: Feb 2001
Posts: 1,290
Likes: 15
From: Toronto, Canada
Dynomax headers
I've been told that headers are worthless if you get cheap ones. Head flanges warp, tubes rust, etc.
Thats why I'd recommend a high-end set like the Hedman Elite.
They have 3/8 inch flanges, thick tubes and thermal coating.
They are not cheap though: $499US
Whats really gonna burn your American a$$es is that they are also $499 Canadian which is like $350 US!
So get a set on your trip to Canada!
The Elite are available for the 390 in 2 and 4 wheel drive, as well as 1/2 and 3/4 ton.
1978 F250 4x4 - 351M
Don't crush them, restore them!
Thats why I'd recommend a high-end set like the Hedman Elite.
They have 3/8 inch flanges, thick tubes and thermal coating.
They are not cheap though: $499US
Whats really gonna burn your American a$$es is that they are also $499 Canadian which is like $350 US!
So get a set on your trip to Canada!
The Elite are available for the 390 in 2 and 4 wheel drive, as well as 1/2 and 3/4 ton.
1978 F250 4x4 - 351M
Don't crush them, restore them!
Senior User
Joined: Jan 2000
Posts: 238
Likes: 0
Dynomax headers
I know headers can be a pain, but any header has got to be better than my cracked leaky manifolds. I want to order these dynomaxes from Jegs, but Im thinking I will try to have a dealer get a pair in so I can look at them first. I called one shop and they want me to pay for them before they order them. I think some of you are confused, Im not talking about the flange, Im talking about an individual tube in the header, that has to come apart and go around a crossmember in the frame. This doesnt sound right to me, but i read it on another post and just want to make sure.
Dave
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Dave
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Posting Guru
Joined: Dec 2000
Posts: 1,686
Likes: 1
From: Racine WI
Dynomax headers
Dave I seem to have the same truck as you 75 4x4 390 4 speed, my truck currently has some rotted out header with no collectors or anything its terrible, i would also love to order the 103 dollar dynomaxs from jegs as they are cheap and my trucks isnt a driver but a farm truck, My current headers are designed so the 2 primary tubes are in front of the motor mount and 2 are behind the motor mount all meeting up at the collector which looks to me as if the motor actually has to be lifted out for the headers to be installed, I DO NOT WANT TO DO THIS, I would also like to see the header I am going to purchase before I purchase it because my purchase depends on what is entail on installing it , Someone one here said the dynomax came in like 2 pieces so you could install it without lifting the motor Im not sure how this would work or leak but any info is appreciated