The whole design in the zj primary exhaust is flawed. Harmonics, motor and tranny mounts condition, pipe routing, all of it. If you consider the next model year of grand cherokees they went back to a cast manifold. That says something. Debates have it that even the bellows type manifold is insuffecient and the real problem lies in a flex connection at the manifold, front pipe connection. Its all a crapshoot. Heat transference from the proximity of that area to the oilpan is also in question. Heat transference to the driverside motor mount can be in question if you deviate fom spec. Who knows?
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Originally Posted by HighLonesome
lol...if life is as a simple as a 5.9 making you happy, I'd say go ahead and buy it on impulse. ZJs are the way of Zen. Wax on, wax off