I have an 08 4Dr X with tow package. I am suffering from alot of front end sagging that was made even worse by my Smittybilt front bumper. My plan is to put in Rubicon springs and JKS ACOS (adjustable coils spacers) I was given a pair of Rubi springs Part # 68004457AA (rear springs) and Front spring # 52126317 AB the other front spring does not have a tag so I am not sure which spring goes in the left or right.

Any thoughts or help would be great

 

The answer to all of your questions:

https://www.jk-forum.com/forums/stock-jk-tech-12/lets-solve-stock-springs-question-85825/

 

after reading the entire link I still do not know if my unmarked spring is a 16 or an 18?

 

If you put them up next to each other, the taller (even slightly) spring goes on the passenger side. That was the case with my oem Rubicon springs, also with the Unlimited Rubicon springs that I replaced mine with. Slightly longer spring is to account for the gas tank on the passenger side.

 

Ok so I went out and measured both front springs one spring was a # 52126317AB it measured at 17.5" the unmarked spring measured at a butt hair over 18making it a full half inch taller. and by what I have read would make the unknown spring a #52126318AB passenger side spring. would you all concur?