08 Jeep Wrangler JK exhaust original exhaust manifold cracked at 54,000 miles.
Replaced with Dorman exhaust manifold, cracked in 3 months, 3100 miles.
Stock mopars on back order until June.
Unfortunately, Doorman products in my experience are hit or miss in quality. I've woked at a few of the auto part retailers (part time while I was in the military and stationed stateside) and Doorman products were almost always one of our highest return items. I'd love to go to their aluminum oil cooler on my JL, but worry that might actually be introducing a problem.
Yea, the 3.8 seems to have a rep for eating those manifolds. I don't think all the Doorman stuff is bad, but form what Ive heard they farm out most of their manufacturing to many places, and they make a million things, thats probably why the quality doesn't seem very consistent across their products. Let us know about the oil filter housing, I'm still interested in the one they make for the 3.6, luckily I haven't been forced to make that decision yetInteresting. Appreciate the experience. I have no previous experience with them. I’m hoping for the best on this damn oil filter housing.
In steel construction equipment, I’ve definitely handed some brand new equipment back to my vendors because I can see visual impurities in castings. New one comes, looks clean, no problems.
Sounds like this problem may also be inherent to the ol 3.8 regardless of manifold manufacturer???