Do I need gasket sealer or anti-seize with this gasket?

Aluminum gaskets don't require sealer — the metal-to-metal seal is the design. Light anti-seize on the bolt threads keeps fasteners from galling during reinstall, but it's optional if you're not planning to remove the header again soon.

Will this fit a stock header or do I need a performance header?

This gasket is designed around factory port dimensions. It works with OEM headers or any aftermarket header that mirrors the original bolt pattern and port layout — verify your header's port spacing before ordering.

What's the return process if the gasket arrives damaged?

Inspect the gasket when it arrives. If it's warped, cracked, or visibly defective, contact ModSupply with photos and we'll ship a replacement — no questions asked.