the first or second embodiment of the suspension control system as set forth above the roll stabilizer 530 comprises a transverse bar section 532 and a pair of parallel bar sections 534 and 536 the transverse bar section 532 extends essentially perpendicular to the vehicle axis and has a circular cross section the transverse bar section 532 is connected to hollow cylindrical bearing sections 538 and 540 at both ends the parallel bar sections 534 and 536 have end segments 542 and 544 of circular cross section adapted to rotatably engage the bearings 538 and 540 of the transverse bar section 532 the parallel bar sections 534 and 536 have rectangular cross section major sections 546 and 548 each of which has one end 550 and 552 connected to a suspension arm 551 through a connecting rod 553 which allows free rotation of the associated bar 534 or 536 the cylindrical cross section end segments 542 and 544 of the parallel bar sections 534 and 536 extend beyond the ends of the bearing portions 538 and 540 link plates 554 and 556 are rigidly fitted onto the protruding ends of the parallel bar sections 534 and 536 the link plates 554 and 556 are rotatable about the bearing sections 538 and 540 together with the parallel bar sections 534 and 536 the link plates are.