Axle-Load front: 540 Axle-Load rear: 735 Lowering front: 30mm Lowering Rear: 30mm Øfront: Ø rear: Adjustable front: Adjustable rear: PRO-KIT | Performance Springs #1 Choice of Automotive Enthusiasts Worldwide! World-leading performance suspension spring system Designed and tested to work perfectly with standard shock absorbers. First step towards a complete sports suspension system. Lower center of gravity: lowers the vehicle up to 40 mm Lowering = Traction + Attraction Progressive spring design. Performance management