If you currently have an Air Lift 3P or 3H system, and want to upgrade to the new ALP4 system, this is everything you'll need! The ALP4 system is backwards compatible with the 3P/3H harness. Simply swap out the manifold and controller together and it's plug and play. The new ALP4 manifold has the same footprint and mounting holes as the old system, so re-installing the new manifold should be painless. The new touchscreen controller is slightly larger, and considerably thicker. If you have a custom tray mount or case, it will not be compatible with the new controller.
It's important to note that if you have a 3P system, upgrading to ALP4 will still result in a pressure-based system, and upgrading a 3H system to ALP4 will result in a height-based system. If you have a 3P and want to upgrade to a height based system, you'll want this Height Sensor Upgrade Kit instead, or in addition to this.
Does NOT include NPT fittings, if you have an older style 3P without threaded ports, you will need 6 fittings as well.
