The difference between the Curt # 13650 and # C13651 hitches are pretty simple.
The # C13651 hitch is designed to fit your 2008 Mariner if you already have an OEM trailer hitch installed. It will also work for your vehicle whether it has a hitch installed or not.
The # 13650 trailer hitch will not work with vehicles that have an OEM trailer hitch installed. If you do not have an OEM hitch, then the # 13650 will work great for you. view full answer...
The two Lippert Trailair 5th wheel pin boxes LC155933 and # LC158777 are actually one and the same part. The old part number LC155933 has been replaced by the new item reference # LC158777. This air cushioned pin box is a direct bolt-on replacement for the Lippert 1716 5th-wheel pin box and it is rated for 21,000-lbs.
The Trailair will reduce chucking, bounce and jarring thanks to its internal air spring and shock system which absorbs these forces to give you a smoother and more stable ride. view full answer...