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Jeep Wrangler YJ
YJ General Discussion
4.0 exhaust header replacement
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<blockquote data-quote="machoheadgames" data-source="post: 441502" data-attributes="member: 18789"><p>I swapped to the Dorman in 2016. Fit like stock, though the donut gasket was a crappy fit. But it did seal. It was mostly difficult to get the donut onto the new manifold itself. </p><p></p><p>The Dorman has the flex joints that Mopar implemented into the #1 and #6 on the 98-99 Wranglers. I’m not sure that by itself really makes a difference but that is what Mopar chose to do up until they came out with the new design in 2000.</p><p></p><p>I haven’t had any cracks but I also haven’t hardly driven the thing since then. Maybe 10K miles at most. I did have the bolts and nuts to the down pipe loosen up multiple times. Ended up replacing both the bolts and nuts with grade 8, and the nuts are all metal locking nuts. I don’t think it’ll loosen again.</p><p></p><p>I considered Banks for a while, the “new” Revolver has been around for probably 15 years if not longer, and the Torque Tube was before it and known for cracking, while the Revolver was supposed to fix that. I never was sold on the Revolver because it was always much more $ than competition and it had very few reviews that felt trustworthy. Now it seems to have enough that if I had a problem again, I’d try it out.</p><p></p><p>I thought about getting one of the late Mopars back when I could find them, but they were like $600. Can still find them, but they are still around $600. Mopar 4883385.</p><p></p><p>Dorman is fine but I haven’t put it through the wringer to say it’s great. I think the stock ones crack so much because of 1) being weak and 2) worn motor mounts allowing the engine to torque over too much which then cracks the weakest link, aka the manifold.</p></blockquote><p></p>
[QUOTE="machoheadgames, post: 441502, member: 18789"] I swapped to the Dorman in 2016. Fit like stock, though the donut gasket was a crappy fit. But it did seal. It was mostly difficult to get the donut onto the new manifold itself. The Dorman has the flex joints that Mopar implemented into the #1 and #6 on the 98-99 Wranglers. I’m not sure that by itself really makes a difference but that is what Mopar chose to do up until they came out with the new design in 2000. I haven’t had any cracks but I also haven’t hardly driven the thing since then. Maybe 10K miles at most. I did have the bolts and nuts to the down pipe loosen up multiple times. Ended up replacing both the bolts and nuts with grade 8, and the nuts are all metal locking nuts. I don’t think it’ll loosen again. I considered Banks for a while, the “new” Revolver has been around for probably 15 years if not longer, and the Torque Tube was before it and known for cracking, while the Revolver was supposed to fix that. I never was sold on the Revolver because it was always much more $ than competition and it had very few reviews that felt trustworthy. Now it seems to have enough that if I had a problem again, I’d try it out. I thought about getting one of the late Mopars back when I could find them, but they were like $600. Can still find them, but they are still around $600. Mopar 4883385. Dorman is fine but I haven’t put it through the wringer to say it’s great. I think the stock ones crack so much because of 1) being weak and 2) worn motor mounts allowing the engine to torque over too much which then cracks the weakest link, aka the manifold. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
4.0 exhaust header replacement
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