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Strange "dents" on exhaust pipe

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Old 06-10-2012, 10:04 PM
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Default Strange "dents" on exhaust pipe

To get my 96 Jeep XJ registered in CA, it had to pass a smog check but before doing so, I discovered the PO had removed the check-engine bulb. After replacing the bulb and clearing a former code for the #1 O2 sensor, I found that the exhaust pipe, where it connects to the flange at the collector pipe, has what appears a dent on both sides. These two dents seem to be large enough to cause a restriction in flow. Is this a factory thing for clearance, which doesn't seem necessary, or just the workings of a previous idiot?

I am just wondering if this restriction is what was originally causing the code to activate because the code still occasionaly returns.

Any insight would be greatly appreciated.
Old 06-10-2012, 10:06 PM
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Mine looks the same way
Old 06-10-2012, 10:33 PM
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OEM.
Old 06-11-2012, 09:02 AM
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That dent is for clearance of the front DS, I found out the hard way by installing a walker pipe and the DS made its own clearance while destroying my header and pinion bearing.
Old 06-11-2012, 09:45 AM
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If i looks anything like this....you are screwed!!!
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jk
Don't worry about it.
Old 06-11-2012, 11:22 AM
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Definitely OEM, it's for front axle flange clearance, though mine still hits it sometimes under full flex!
Old 06-11-2012, 11:37 AM
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Mine connected with the DS because my motor mounts are crappy and need replacing.
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