think i've talked myself into replacing the passenger manifold, and I can get the Dorman part for 65 bucks.. but i don't want to be doing it again in a year. how are these manifolds holding up for you guys? also read a review that the gaskets that come with them aren't great and to run Felpro. i plan on replacing all the studs with new studs as well.

 

as common as this is i figured someone would have used one..

 

You woulda thought someone, anyone else would have tried this already but nope. I'm wondering if I should throw a set of dormans on mine now lol.

 

Don't do it
if I was selling or flipping a truck maybe. Long term no way

 

probably doesnt help here but I put a Dorman on my 300 a couple years ago. real nice piece

 

I use Dorman manifolds quite often and have had no problems
They all warp and crack
The Dorman ones seem to hold up as well as the OEM ones do

 

Do you have them planed or use gaskets or none of the above or something else?

 

Yes you will need a gasket on either manifold you choose
The factory no gasket thing is for new heads and a new manifold
Then they can warp together
When you replace a manifold later on a used head you will need a gasket

 

I put Dormans on my '04 4.6 when I yanked out the engine during the first two months of the covid lockdowns... The truck developed cold-start exhaust leaks elsewhere, but it's all still nice and sealed where the manifolds mate to the heads. As much as I hate a lot of the Dorman stuff, I gotta say that these pieces weren't bad at all. At least so far.