Want to run AN fittings for all your radiator connections? Here's your solution for the lower radiator connections on your commonrail Cummins! There are a 3 piece design that allow you to mix and match the parts you need, Lower waterneck, tensioner bracket and A/C compressor bracket can all be purchased seperate. They allow for a -20 an straight cut oring fitting and a -10 straight cut o-ring fitting on the return if you need to run lines to heater core.