nitroman15

http://www.noas4x4club.com/forum/viewtopic.php?f=32&t=1511

I think that they are from a late 80's turbo 300z. I purchased them from here: https://www.4x4parts.com/nissan/exhaust-manifold-bolt-nut-washer-kit-p-4193.html

Would really like to do this to my hardbody. Thanks for posting.

I would get the zx studs. After having to remove several broken stock studs, I wouldn't want to use the stock ones. I have had the zx studs for 5 years and no sign of rust. I have removed my headers several times in the last 5 years to repair cracks and the nuts are easy to remove.

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