Easy bend copper 24"long brake pipe with one female and one male end for the regulator on the rear subframe to the n/s/r hose on hydrolastic cars only.
Also used on split front to rear system with valve in engine compartment - from 3 way union on rear to n/s/r hose. These pipes are retail less 35% discount at least to keep prices viable.
see 21A51 pre bent steel, though this will only fit with regulator, not the T