The original traction package (stage 1) clamps the leaf springs together and utilizes the factory slapper bar and takes the majority of the travel out of it. The new stage 2 package adds a QA1 adjustable shock for the axle (the horizontal shock) that can be adjusted to much stiffer settings than the stock shock, and polyurethane subbers that are a 1/2" longer and stiffer than the stock snubbers. These snubbers will actually place preload on the slapper bar, just like the aftermarket traction bars do. I would recommend the snubbers for track only. Just changing the shock and setting it at #10 (goes to 12, stock is approx 8-9) is a noticable improvement, and the snubbers help even more. The stage 3 package adds those awesome QA1 12 way adjustables to all 4 corners and makes an incredible difference in weight transfer, you will not be disappointed. The shocks have exclusive JMB Performance bushings and modified T-bars, so they have OEM fitment. All the adjustment ranges make them perfect for any application, handling, drag racing, road racing, or just cruising comfortably. Heres the links with pricing:
http://jmbperformance.com/store/index.php?cPath=66_93
Justin
http://jmbperformance.com/store/index.php?cPath=66_93
Justin