# Exhaust manifold nuts

**URL:** <https://community.cartalk.com/t/exhaust-manifold-nuts/206622>\
**Category:** General Discussion\
**Created:** [November 15, 2026, 9:01pm UTC](https://community.cartalk.com/t/exhaust-manifold-nuts/206622 "2026-11-15T21:01:30Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Cavell](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cavell/32/43396_2.png) [@Cavell](https://community.cartalk.com/u/Cavell)\
**Post date:** [November 15, 2026, 9:01pm UTC](https://community.cartalk.com/t/exhaust-manifold-nuts/206622/1 "2026-11-15T21:01:30Z")

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I have to remove an exh manifold from head and noticed the nuts are brass. Or is it copper? Is that material less prone to corrosion or being eroded from heat cycles vs a steel nut? They are tiny also. 10mm hex. That’s German stuff I suppose.