From everything I’ve read & seen, the Hemi truck engines with aluminum heads and cast-iron factory exhaust manifolds are MURDER on exhaust manifold bolts. Specifically, they all end up breaking bolts & develop exhaust leaks on both the driver & passenger sides, typically at the rear. Replacement with stainless steel bolts is an option, but even those eventually break (1-4 years is the timeframe I’ve read), and the speculation is it’s an issue of uneven heat dissipation (heads are aluminum & manifolds are cast iron), causing the manifolds to warp just enough to sheer the bolts off. You can typically see this at any auto wreckers - walk around and touch the heat shields on Hemi Ram & Durango and note they are almost all completely loose at the rear end because of broken bolts. See the multitude of YouTube videos on how to remove broken Hemi exhaust manifold bolts.Info on options for headers...
-Stock ram manifolds work fine.
-Durango set headers most likely fit with 4x4
-Schumaker makes a set of long tube headers, but the fitment on the passenger side isn't very good and the quality of the headers themselves has been said to be pretty shitty. View attachment 110043
-There are some cheap shorty headers you can get off eBay that fit with a little ding on a tube on the passenger side. I believe the brand name ones are OBX. View attachment 110041
-Pacesetter mid length headers seem to fit. Although I believe they require a bit of hammer action on the passenger side also. Someone with a 4x4 said they had to grind the top of a motor mount bolt for fitment, but it isn't a primary bolt and didn't require any pinging.
-JBA headers I think have the same fitment as the pacesetters.
-It looks like any shorty headers will fit. View attachment 110042
-Having some custom made is also an option, but probably pretty expensive.
-I won't be able to confirm this until my swap is done, but evidently there are a couple more options for the 4x4 trucks due to more space available.
**I'm not a professional motor builder, so I don't know this for fact... But someone said that the benefits of headers only come in at around 5500rpm. So unless you're racing your truck, stock manifolds are just fine and what I plan on keeping in mine.
I should have said aluminized steel. Like these: BBK RAM 1-3/4 in. Tuned Length Shorty Headers - Chrome 4014 (09-18 5.7L RAM 1500)I’d love to see a set of aluminum headers, don’t think they will handle the heat. But I’d love for you to prove me wrong