I have a Roadmaster Active Suspension for sale, part number 3611-Y fits a 2009-2014 Ford F-150 4WD. It was on the truck for less than 500 miles and is in like new condition. I tried it out towing my new trailer and have decided to go with an F-250 for a more relaxed towing experience. Includes original box, instructions and the 1mm & 2mm spacers used to adjust the spring tension. Price is $250 plus shipping. Thanks for looking.
Tom