Dorman 674-694 Passenger Side Exhaust Manifold Kit – Includes Required Gaskets and Hardware Compatible with Select Ford / Lincoln Models (OE FIX)

Great value
These exhaust manifolds fit perfect on my 05 f250 5.4

The Ceramic Version looks way better than stock!
The Ceramic Version looks way better than stock. It looks better than the standard doorman replacement. The finish and internal casting looks smooth. The ceramic coating seems to be thick… very nice! The only improvement would be to include stainless steel studes and nuts and better gaskets. I purchased a replacement stainless steel doorman studs and nuts and mahle gaskets to replace the ones that came with this kit.

Part was great, install was tough on 2009 Expedition
Manifold worked well. Install was an ordeal. 16 hours fighting with broken studs. Use a wire welder and lots of patience to remove studs.

Great replacement for a great price
The manifold appears to be constructed fairly well. It’s obvious that the casting is not quite up to FoMo standards, but It’s also nowhere near the price. I installed the manifold on a 2006 Ford F-150 5.4L. What a huge pain. It has been on there for over a month. I’ll keep on an eye and ear on it for any signs of degradation and report back. Others have noted that their manifold has cracked after a short period, but it’s possible that is caused by installer error.Some tips for removal/installation:Since this is the passenger side (2006 Ford F-150), don’t bother moving your exhaust back like some videos on youtube suggest. It’s much easier if you remove your starter. That will give you enough room to slip the new manifold up from the bottom. To get the old one out, after you have removed/broken all of the studs, don’t mess around and just use a sawzall or equivalent and cut the manifold in half and remove it in two pieces.To remove the studs, buy the titan stud exctractor here on Amazon. It worked very well for me. I was very lucky and didn’t have any break off in the head. I liberally applie PB blaster to the studs the night before starting the project, and periodically while I was working. A little heat from a propane torch will help too, but don’t go crazy. When the studs were removed, I could see the blaster worked its way in to the threads with the application of heat.Also, shop on Amazon, or at your favorite low price chinese tool store and buy many different swivel attachments, extensions, you name it, for your sockets. You’ll need them. Nothing is worse than not having the right tools on hand for the job.It’s a good idea to clean up the surface of the exhaust ports (with exhaust leaks comes corriosion) with a die grinder and a bristled sand paper wheel. I wouldn’t use a metal wheel as it may remove too much material too fast. You can check for flattness across the ports with a straight edge when they are clean. I didn’t.

My Ford 5.4 would warp/crack exhaust manifolds every two years because of the terrible Ford design. These were the most expensive replacement manifolds I could find that I bought hoping they would last. I didn’t get to run them long enough to see if they lasted any better than the cheaper ones, but in the time I had them they sealed up and didn’t crack. So far so good.

PROS; Part looks mint, its thick and has no thin spots / weak spots and the ports are aligned and flat, give this manifold a good surface prep like high temp paint and will probably last a few years. just follow the instalation tightning / torque sequence..CONS; The gaskets that came with it looks okay , double wall , only thing is they had a huge dent on the side

Excellent product. Fit my 2006 F150 5.4 perfectly. Patience and a welder was definitely needed. Saved myself approximately $1200.