Do I need clamps for this hose?

Yes. This hose does not include clamps — you'll need worm-gear or spring clamps sized for 2.00" and 2.50" barbs. Standard automotive hose clamps work fine.

Can I use this for boost lines on a turbocharged setup?

Silicone hose handles boost, but verify the wall thickness and pressure rating for your specific PSI. This spec sheet doesn't list pressure rating — check with your turbo kit manufacturer or test-fit before pressurizing.

Does the 90-degree angle point a specific direction, or can I rotate it?

The bend is fixed — the elbow points one way. Make sure the inlet and outlet angles match your plumbing layout before ordering. If you need a different angle, a straight reducer plus a separate 90-degree silicone elbow gives you more flexibility.