I have the following:

HZ ute/van standard springs, part numbers 9935933 & 35 (LH & RH):

Primary x 3 @ 8mm, secondary x 1 @ 13mm.

Primary RH: 3270nM @ 66mm camber.
Secondary RH: 6565nM @ 13mm camber.
Primary LH: 2800nM @ 66mm camber.
Secondary LH: 6065mm @ 13mm camber.

Primary rate is 29.3 kN/m
Secondary rate is 51.8 kN/m.

This is straight from the HZ features manual.