Application 2007-2013 compatible for Ford Expedition 5.4L 2007-2013 compatible for Lincoln Navigator 5.4 L Specification Reference OE/OEM Number:7L1Z5A891B, 8L1Z5A891B Placement on vehicle: Rear left or right side Quantity:1 piece air spring bag Accessories: O-Rings kit (as picture showed) Platform: Compatible for Ford T1 Feature-New ang high quality -one year warranty for any manufacture defect -Mates with OE Air Lines -Designed for Comfort Suspension Note- These air suspension bags are aftermarket ones. They will replace the original rear air springs. -Instruction is not included. Professional installation is recommended -Contact us please for whatever we can help -Please double confirm the compatibility as well as the OEM number before purchasing.