The 8500 Series Air/Hydraulic Trailer Kits include control valves, air tank, air/hydraulic booster and a complete 

hydraulic line kit for tandem axle trailer. ABS kits also include the necessary components for compliance with 

FMVSS571.121 re quire ments for Antilock Brake Systems, mandated for trailers manufactured after March 1, 2001. 

These ABS kits are “2S/1M” systems, requiring 1 axle to be ABS equipped with sensors and 

tone rings. The axle is the determining factor for which kit should be used.   FREE DELIVERY!!!  "LOWER 48 STATES"