Do these mount directly to the frame or do I need brackets?

They bolt to your truck's factory mounting points — no brackets required. Use the existing holes on your frame for a clean, direct install.

Will the chrome finish hold up to road salt and mud?

Chrome is naturally corrosion-resistant and designed for outdoor use. Rinse them off occasionally if you're in a salt-heavy environment, but they won't rust like bare steel.

What fasteners do I need to bolt these on?

Fastener specs aren't included in the product data — check your vehicle's service manual for the correct bolt size and torque spec for your frame's mounting points.