Arrived 3 days early! I will update the review after installation and will update again after testing the drive. So far so good, you look and feel great too! OE or OEM. It breathes only lightly and lets through the smallest trickle of coolant. The description says it's aftermarket fit and the website says the same. The bottom line is that if your material isn't genuine, one of the best cooling system manufacturer parts isn't going to match the ALL JOINT! Hope this helps you! fits perfectly.)