Will this work for my coolant line without clamps?

You'll need hose clamps on both ends. Silicone hose works best with stainless steel clamps tightened firmly—don't rely on friction alone.

Can I cut this hose to a shorter length?

Yes. A sharp utility knife or hose cutter works fine. Cut straight across, then test-fit your clamps—the cut edge should sit cleanly under the clamp band.

Does this hose need any prep before installation?

Rinse the inside with clean water to remove any manufacturing dust. No paint, primer, or other prep needed—install and clamp it down.