Do I need hose clamps to secure this?

Yes. Clamps are not included—you'll need to source appropriately sized stainless steel worm-gear or band clamps for both ends of the hose to ensure a watertight seal under pressure.

Will this handle boost pressure and coolant flow at the same time?

This is built for high-temperature and pressure applications common in turbo and supercharger systems. Confirm your system's PSI rating and coolant temperature before install—3-ply silicone is rated for sustained heat, but your setup determines actual duty.

Can I use this on both coolant and vacuum lines?

Silicone handles both, but vacuum and boost lines have different pressure requirements. Size and confirm the hose matches your system's vacuum draw or boost pressure—don't guess on duty.