Do I need new bolts or studs to install this?

Your existing header bolts and studs work fine—this gasket seats with factory fasteners. Check bolt condition before install; if they're stripped or corroded, swap them out.

Should I prep or clean the gasket surface before bolting down?

Wipe both the header flange and cylinder head surface clean with a rag to remove any carbon or debris. A clean surface gives you a better seal right away and prevents leaks from day one.

What's your return window if the gasket doesn't seal?

Test-fit and torque the gasket to spec before running the engine. If you get a leak after proper installation, reach out to our support team with photos and we'll make it right.