We do a lot of conversions and modifications on brand new Jeep's. Because of this, we often have factory parts in new or like new condition.
The last two digits on the spring part numbers are 17 or 18 for the front and 58 or 59 for the rear.
These parts are sold "as is", with no guarantee as to what effect they will have on your particular vehicle.
There are plenty of forum threads about swapping springs and shocks on Wrangler JK's. Please do your research BEFORE purchasing. Most of our builds start off as Unlimited Rubicon's with the "Dual Top" option, as well as all other factory options besides leather. In theory, these vehicles "should" come with the tallest/firmest combination of springs and shocks. However, we still don't always receive springs with the same part numbers. Most of our sets are 17's or 18's and 58's or 59's. Please call if you are looking for a specific combination. In our experience, there is very little difference between the sets that we normally have in stock when installed on a vehicle.