Quote:
Originally Posted by Joon525
None.
Look at the studs in the header from your own picture. They're threaded all the way down too (and into the flange).
Using a quality gasket is of more concern.
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They're actually threaded at the ends, and where it sits in the manifold it's free of any threads. But if it's not an issue that works for me, planning to grab a new grimmspeed gasket as the one on there doesn't look like it's in great shape.