Originally Posted by Super Werty

The ac reservoir on the csf radiator has a bolt plugging it for (shipping/so no dirt gets in there.) On the bolt is a flat green rubber washer. That is the one you need to use to prevent leaks

Stock ring is a black rubber ring

I didnt use the black plastic bracket. And I removed the OEM black plastic bracket. This allows you to use/bend oem lines with csf radiator/condensor.