3blackbirds
NAXJA Forum User
- Location
- Hummelstown, Pa.
Hello all,
I'm trying to figure out this issue for my 1999 Cherokee with 0630 head.
Within the past year:
Stinky Fab Racing Motor mounts.
(I've had M.O.R.E, but they're a bit too stiff for me)
OEM Trans mount
Mandrel bent down pipe with 6" flex joint.
I keep breaking manifolds at the welds every 2 years. I've gone from cheap to APN and Dorman. I'm tired of doing this job. I've just replaced my 4th.
My next move is to put the two piece cast exhaust manifold from the 0331 head, plug the 02 sensors and have a new down pipe made up with a new bung for one 02 sensor. I know I'll need an adapter plate because the 0331 manifold won't cover the 0631 exhaust ports. Yes, a more restrictive manifold but I'm tired of the cracking. I have a 4" lift, so piping will clear the driveshaft.
Is there anything I'm missing or can consider before I put the two piece on? I don't want to spend hundreds on this for an aftermarket two piece right now. I'd like to get this set up and stable before I purchase a nice Borla or Banks etc. down the road.
Thanks in advance

I'm trying to figure out this issue for my 1999 Cherokee with 0630 head.
Within the past year:
Stinky Fab Racing Motor mounts.
(I've had M.O.R.E, but they're a bit too stiff for me)
OEM Trans mount
Mandrel bent down pipe with 6" flex joint.
I keep breaking manifolds at the welds every 2 years. I've gone from cheap to APN and Dorman. I'm tired of doing this job. I've just replaced my 4th.
My next move is to put the two piece cast exhaust manifold from the 0331 head, plug the 02 sensors and have a new down pipe made up with a new bung for one 02 sensor. I know I'll need an adapter plate because the 0331 manifold won't cover the 0631 exhaust ports. Yes, a more restrictive manifold but I'm tired of the cracking. I have a 4" lift, so piping will clear the driveshaft.
Is there anything I'm missing or can consider before I put the two piece on? I don't want to spend hundreds on this for an aftermarket two piece right now. I'd like to get this set up and stable before I purchase a nice Borla or Banks etc. down the road.
Thanks in advance


