Do I need coolant hoses or other hardware to install this?

The radiator itself mounts at factory points without additional brackets. Your existing hoses and fittings reuse — just confirm they're in good condition before connecting. If you're replacing hoses too, do that at the same time while everything is apart.

Can I reuse my old coolant or do I need to flush the system?

Fresh coolant is the smart move when you swap radiators. Drain the old stuff completely, flush the block and hoses if they look gunked up, then fill with new coolant to spec. Your service manual has the exact type and capacity you need.

What if it doesn't fit when it arrives?

Test-fit it in the engine bay before you disconnect anything. The mounting tabs should align with factory points on the frame. If something's off, contact support with photos and your specific model year — we can sort it out fast.