Do I need hose clamps to install this?

Yes. This hose ships bare — you'll need hose clamps sized for 3/8-inch barbed fittings. Stainless steel or worm-drive clamps work well for fuel applications.

Can I use this hose inside the cabin or in high-heat engine bay areas?

NBR hose handles fuel and moderate temperature swings, but keep runs away from direct exhaust heat. If your setup runs line near headers or turbo piping, sleeve it or route around the hot zone.

What if I only need 5 feet — can I return the rest?

You're buying a 10-foot spool as-is. Excess hose stores easily and has a long shelf life, so most builders keep spare on hand for future projects or repairs.