Do I need clamps, and what size?

You'll need hose clamps on both ends—the hose itself does not include them. Standard worm-drive clamps sized for 2-inch hose work fine. Tighten until snug, then back off a quarter turn to avoid crushing the silicone.

Can this handle boost pressure or is it coolant-only?

This hose is rated for both. Use it on intercooler piping, turbo inlet, or coolant bypass lines. The 3-ply construction prevents ballooning under moderate boost. For max PSI limits, test your specific plumbing setup before high-boost tune.

What if the 90-degree angle doesn't quite fit my engine bay routing?

Cut the hose to a shorter length if you need a tighter bend radius, or use a length of straight silicone hose upstream or downstream to adjust the final plumbing path. The fixed angle itself cannot be re-shaped without heat.