The springs I have found eibachs now say they only lower the car 1 inch,you have to align all 4 after.Also one XF owner said they settle after driving a while.Then you may have to realign again.Total cost is $700-800.Unless you can do yourself .The car looks good a little lower.I just got another XF and it rides different than my other one even though it has the same tires.It just seems smoother.The stock springs will settle also after afew 1,000 miles.