Do I need new bolts to install this gasket?

Hardware not confirmed with this gasket. Reuse your existing manifold bolts if they're in good condition, or grab a fresh set of OEM hardware to ensure proper clamp load and seal integrity.

Should I clean the mounting surfaces before installation?

Yes — wire brush or scrape away any old gasket material and carbon buildup from both the cylinder head and manifold flange. A clean surface ensures the aluminum gasket seats properly and seals tight.

Will this gasket work with an aftermarket exhaust manifold?

This gasket is cut for the factory Supra manifold. If you're running an aftermarket header with different bolt spacing or port shape, confirm the mounting pattern matches before ordering.