Lowering kits for Aprilia RSV4 and RSV4 RF 1100 by Lust Racing. Rear suspension lowering kit for RSV4 to reduce the seat height comes with two suspension bracket plates made in steel. The brackets replace the standard units that they replace. We measure the change in height at vertically from the rear axle to the upper surface of the seat unit. The Aprilia RSV4 lowering kit comes complete with installation instructions, manufactured in UK by Lust Racing Ltd.