3S springs was particularly made to be sure of this LP shocks combined with straight back springs are 4mm faster than previous NT1 springs.
the important thing and straight back springs are in possession of comparable size to have additional in-corner steering and simplify your tuning components selection.
The 3S springs, like most XRAY springs, are by hand determined, plumped for and matched into pairs to make sure precisely equal size and damping traits.