Quote:
Originally Posted by rfuerst911sc
I received the parts the other day and they are punched steel really no gasket to speak of. So they are metal ( stainless ? ) with punched holes and " raised " ridges so this is what modern exhaust gaskets look like ?
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Yes, this is a modern multi-layer steel gasket with embossments (ridges).
They are designed to maintain a torque set, resist corrosion and accommodate different combinations of cylinder head and exhaust manifold materials.
The embossments (ridges) improve load control (reduce the required clamping force) and sealing.