Dorman has updated their 4.2 inline 6 exhaust manifold

DIYguybob

Member
Joined
Oct 9, 2024
Posts
18
Location
Ontario
Hi guys, just ordered my third Dorman exhaust manifold 674-990 and it looks much better than my previous two did which were made in China. This one is made in India (dated Sep 2024) and comes with a beefy heat shield. The old Dorman exhaust manifold shields looked like crumpled up tinfoil and rotted from the inside out. Take a look at the old pictures vs the new pictures for the same part. Luckily it has a lifetime warranty, unluckily, this is the third labor charge to replace this part. I do almost all my own stuff, but don't want to do this job in case a bolt breaks. It came with the manifold gasket, donut and studs for downpipe. I had to buy new manifold bolts. Trying out the Dorman premium stainless ones 03413HP. Hopefully they last longer.

Screenshot 2025-10-27 182652.jpg
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Last edited:
Interesting. Sure hope it does last for you. My '07's original manifold is still hanging on so will keep this in mind if ever it fails.

Thanks for the info.
 

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