Manifold Replacement

[Collin Crosby]

Gotta do a manifold replacement on a 98 TJ 4.0 because of the usual cracking I would weld it up but it pretty bad and is in multiple areas but wanted to know what the best replacement/upgrade or what yall did so it doesn't Crack agan or I don't have to fix it again links would be greatly appreciated thanks.

 

[Fabrik8]

Original manifold? If it is, and it took 20 years to get to this point, making a radical change so it won't happen again is probably not necessary.

 

[Collin Crosby]

Original manifold? If it is, and it took 20 years to get to this point, making a radical change so it won't happen again is probably not necessary.

Not sure looks to be oem, just front looking at threads people have replaced with oem ones and them crack on them again if oem lasts another 20 yrs or so great but I don't wanna change it again in 2yrs

 

[junkxj]

I just replaced the manifold on my xj recently.
I used this one, the fit was good and everything lined up correctly. Of course I cant comment on the longevity of it yet.

Exhaust Manifold & Gasket Kit for Wrangler Grand Cherokee 4.0L Stainless Steel 712492950427 | eBay

 

[skyhighZJ]

I bought mine for my ‘97 XJ (same thing) off eBay. Stainless with the flex pipe on the runner for the front and rear cyclinder. It seemed to hold up well and the guy who has the Jeep now hasn’t had any issues either. It was under $100 and was built well.

Stainless Steel Exhaust Manifold & Gasket Kit for Grand Cherokee Wrangler 4.0L 713803817217 | eBay

 

[a_kelley]

I've installed a few of the above style mani's with no trouble with longevity, except one, three or so years old, cracked at y. Check injectors for leak & flow, as well as exhaust hangers. The pipe on xjs is clamped and bracketed to the driver/pass side of the trans, not sure on the the, but without that brace, it transfers a good bit of torque on the manifold. As well, check motor & trans mounts. I've thought of adding in a flex section under the bell housing to take a good bit of the flex but my welded mani's are doing fine after 3 years in my xj & zj. (I welded up 2" in the y after stitching together)