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      09-17-2024, 12:10 PM   #6
Sublivion
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Drives: 2008 E92 M3
Join Date: Sep 2021
Location: Haymarket, VA

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As others have mentioned - don't reuse the donut gaskets and just get brand new. If you installed an aftermarket x-pipe make sure to use the correct length bolts when mating it up with the headers. I reused the oem bolts and noticed that my O2 sensors were getting destroyed every few thousand miles because it wasn't closing the gap enough because of the shortened threads of the oem hardware.
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