Will I need new gaskets and fasteners to install this?

The header itself is included, but gaskets and mounting hardware are not. Pick up a header gasket set and stainless fasteners (M10 bolts typically) before install to avoid air leaks.

Do I need to tune or reprogram after installing this header?

A header alone won't throw a check engine light on most S2000s, but pairing it with a full exhaust system or ECU tune will unlock its flow benefits. Running it stock-manifold style is fine for bolt-on installs.

Can this header be ceramic coated or wrapped?

Yes—stainless steel accepts ceramic coating and heat wrap. Many owners coat headers to reduce underhood heat and protect engine bay components. Apply coating after test-fitting but before final installation.