Who makes them?

Google www.fordpowertrain.com, Slumlord.

There are threads in the Forum archive regarding members who have modified the motor mount provision of these headers.

Also, notice that in listing these on his web site, John Mummert lists a contact at Ford Performance Applications (FPA) for additional info or purchase.

Unfortunately, when Ted Eaton did his header dyno tests, those members who have purchased these FPA headers were not able to get them to Ted. Although more expensive than what Sanderson is offering, I'll wager that the FPA units will significantly outperform the Sanderson headers if your engine has Mummert cylinder heads.

No proof available to back my talk up, though.

Hope this helps.


NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York

I've learned on this forum that FPA offers the only readily available long tube headers that fit early birds without fender cuts. They also make oil changes more, um, "challenging" since they wrap around the oil filter. I've seen a remote oil filter installed on a tbird with FPA headers, just for this reason.

To make the most out of investing in LT headers, of course you need an appropriate cam.

Others may jump in hear and correct me if I'm wrong. I was always under the impression that with a street car there was little or no advantage having long tube (what we can tuned length) headers over other good free flowing headers like Tri Y style because once you add the rest of the exhaust system a back pressure is created that eliminates the scavenging effect created by the equal length primaries and set length collector.

I like mine. I also did the steadyrest conversion on the mounts. Stan Johnson at FORDPowertrain Applications. Or 253.848.9503.
I have some stuff about it here.

       A  L  A  N   F  R  A  K  E  S   ~  Tulsa, OK    

I sent a set of FPA headers to Ted, and he sent them back with the dyno results. I dont know if he added the results to the test article If not, Ill try to find them and post them, if I can figure out how. He did several pulls,short and long extensions, with and without mufflers. When I took them to the coating guy, he said they were burned as clean outside as anything he'd seen. They are a bit tight in the bird, but they work well.

Stan at FPA, who's a very well regarded Ford engine guy up here, designs them, but I believe Stan's Exhaust in Auburn, WA produces them. Two Stan's, confusing. The exhaust shop is a couple older hot rodders, who have about the nicest, mandrel bending equipment you could ask for. They did some of the bends for the intake tubing on my F code motor, in stainless. They also make the stainless flanges, if you want to build your own.

Many years ago, on an OT motor, we cut a set of Eagle 4 tubes apart, and made them into Tri Y's. 400 cid, Brodix heads, moderate cam for the engine size. This was a 6000rpm motor, and the boost in the midrange was really noticeable. Same exhaust all the way back. They were properly phased for the firing order.

miker
55 bird, 32 cabrio F code
Kent, WA
Tucson, AZ

I have been leaning towards the Sanderson headers. I am thinking the FPA headers would give me higher horsepower but I am not really thrilled about the steady rest mod. I prefer to keep things as close to original as I can. I think if I was building a strictly drag race car the FPA would be better. Mine is more of a street car that I want to be able to drag race and be competitive but not an all out drag car. I have the cam and Mummert heads to go with headers. Want to go with 2 1/4 to 2 1/2 inch system all the way back. Still trying to figure out how to get 2 1/2 inch tailpipes to fit in to the thru the bumper adapter. Looks like that will be interesting!

My exhaust dumps just forward of the bumper and you wouldn't know unless you kneel down and look underneath. Though it is not original, my bumper stays clean, and the exhaust gases can cause rusting in that area.

When I eventually have to replace the system I think I would do the same again.

Miker are you saying you had some HP increase with Tri Y headers over tuned length type with nothing else changed?

They are included.

http://forums.y-blocksforever.com/Topic55379.aspx

A tri-Y was also tested.


Lawrenceville, GA

I have had these headers on my 55 street/race Bird for a long time and I was concerned with the steady rest as well. I do race the car and it leaves hard being a stick car. Last year I broke the Heim joint after many years of abuse and found that the supplied joint is not made of very good material. It's load capacity was 5,100, I replaced it with a capacity of 9,500. I never got around to doing the conversion but I needed to. Now for the exhaust, I run 3 inch from the headers all the way and exit through the bumper like stock. I had to machine the bumper bumperette insert to accept the 3 inch pipe. The mufflers are 3 inch Flowmaster Pro Series and the whole system is located as was original just larger. I used all mandrel bent pieces and welded them together. The exit through the bumper was a challenge to say the least but well worth the effort. I Plan to dyno on a chassis dyno through the exhaust system, and open headers some day to see the difference. I know that the pipes going over the rear end is a killer. Before this I had 2 1/2 inch to the muffler and 2 1/4 the rest of the way and I had a muffler shop do it but it was not mandrel bent. Doc Eaton convinced me to go the mandrel route this time.

  Vic Correnti