Will this bolt directly into my M2 without any adapter brackets?

Yes. This is a factory OEM unit that mounts at the original radiator location. No brackets or modifications needed.

Do I need to flush the system before installing this radiator?

Flushing is always a good practice before a radiator swap—it removes sediment and old coolant. Install the new unit and refill with the coolant grade specified in your service manual.

What's your return window if the radiator doesn't fit or leaks on arrival?

Contact our support team with photos of the issue. We'll verify fitment and condition, then arrange a replacement or return based on what you find.