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

Aluminum gaskets like these are designed for multiple removal cycles. You can reuse it if the gasket surface remains flat and undamaged — just inspect it before reinstalling. If you see cracks, deformation, or crushed material, swap it out.

Should I use sealant on the gasket?

Most header installations work fine with the gasket alone, especially if both mating surfaces (header flange and cylinder head) are clean and flat. A light coat of high-temp gasket sealer can help on older engines with uneven surfaces — test-fit first to confirm the gasket seats properly without it.

Will this gasket fit headers already on my engine?

Measure the port opening spacing on your current header against this gasket's port layout before ordering. Aftermarket header designs vary — confirm your header flange pattern matches this gasket's bore configuration.