Do I need to replace this gasket every time I remove the header?

Yes. Header gaskets are crush seals—once you break the bolt torque, the surface deforms and won't seal again. Reusing it will cause leaks. Buy fresh gaskets anytime you pull the header.

What tools or fasteners do I need to install this?

You'll need a socket set to remove and reinstall your header bolts. The gasket itself requires no additional hardware—it sits between the header flange and cylinder head. Torque specs are in your service manual.

Should I clean the mounting surfaces before installing the new gasket?

Absolutely. Wire-brush or scrape both the cylinder head and header flange to remove old gasket material and carbon buildup. A clean, flat surface ensures a proper seal. Any debris trapped underneath will cause leaks.