I replaced mine around April of this year and ordered them from Rocky Road. I actually measured the 2 springs and the A spring is ~1cm taller.

This was from ARB when I emailed them regarding A and B springs:



Jason-

Some of the OME spring sets have “A” and “B” designations. The 2993 coils fall into this category. These designations show there is a 10mm height difference in the two springs. That difference in height is to aid you in fighting vehicle lean.



We suggest measuring your vehicle as it is now, and figuring if you have a low or high side. This info will help you find the best placement for the springs. In most applications where both front and rear springs are of the A/B style, we suggest staggering them so you do not have both taller springs on one side (front and rear), and low springs on the other.



Hope this info helps, please let us know if you have any other questions.



Matt Glass

ARB USA

Tech and Marketing Assistant