Do I need fasteners to install this clamp?

Fasteners are not included with this clamp. You'll need to source bolts, nuts, and washers separately — standard hardware store stock works fine. Dimension depends on your mounting setup, so measure your attachment points before ordering.

Can I use this clamp on a ceramic-coated or polished pipe?

Bare steel clamps can mark polished or coated pipes under vibration and clamping pressure. If your pipes are finished, consider using a rubber-lined clamp or wrapping the contact points with protective material before installation.

Will this clamp rust if exposed to moisture?

Mild steel will surface-rust if left unpainted in wet conditions. Coat it with exhaust-safe paint, high-temp spray, or a rust inhibitor before install to extend life and maintain appearance.