I just did mine today. I replaced all of the nuts and 8 of the studs. I had only planned to remove 8, 4 on each side but ended up taking all of them off. Luckily, they weren't beat up and I was able to reuse them. Make sure you have the Nissan (OEM) gaskets, all others will fail, to include the ones that come with the JBA headers. You don't want to do this twice. Have fun and take your time.
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