S197 OEM Rear Spring sets

[shooterm1]

Need the specs for these two rear spring sets

One marked - SAR 5R33-5560-AC E29EJ

Next marked - SBR 5R33-5560-BC E29EA

any info related to the two codes (how to interpret) and their rate is greatly appreciated.

 

[socalwrench]

I know this question was posted a few months ago; however I just came across the answer. Please keep in mind that there are several springs that came on the s197 Mustang. Year, model and options dictate which springs your car came with from the factory.

5R33-5560-BC: rear spring, standard, GT
rate: 24.9 N/mm, free ht: 361 mm, tag: blue

5R33-5560-AC: rear spring, special, Bullitt Mustang
rate: 24.9 N/mm, free ht: 355 mm, tag: light blue