Do I need clamps, and what size fits this hose?

Yes, you'll need hose clamps rated for 2.50-inch diameter tubing. Stainless steel constant-tension clamps or worm-drive clamps both work — verify fitment to your barbed fittings before assembly.

Can this handle coolant systems, or is it turbo-only?

This hose works for both. The 3-ply silicone handles coolant temps and turbo boost equally well — common uses include intercooler pipes, radiator bypass lines, and charged air intake runners.

What temperature range does this silicone handle?

Silicone this grade typically sustains continuous temps in the 200–250°F range without hardening or cracking. Exact max depends on coolant type and boost duration — check your system's operating envelope against hose specs before committing to a build.