Standard OME springs:
OME990 = MD = 14.56" free height , 8.9 coils, 530 lbf/in, 18mm wire
OME991 = HD = 14.37" free height, 8.9 coils, 630 lbf/in, 19mm wire
More info:
Cutting ~1.5 rotations off the OME MD springs brings their rate up to 630 lbf/in, and a free height of 12.10"
Cutting ~1.0 rotations off the OME MD springs brings their rate up to 600 lbf/in, and a free height of 12.92"
IIRC, the spring compartment in the stock/OME struts are ~11.75" long. The 5100s are going to have a smaller compartment since they add pre-load for the lift, so the 12.10" length of the 1.5 cut OME990 spring is OK.
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