If you are converting your 6.0L Ford Powerstroke's transmission pan and filter to the one used in 6.4L Powerstroke's, this CNC Fab In-Line Transmission Filter By-Pass Manifold is needed. Your stock 6.0L transmission filter in the pan will not properly filter the fluid as it is more of a screen to catch larger debris if you ONLY install this manifold without the 6.4L pan and filter.