The new TREK MASTER R/T shock absorbers by TOKICO use the latest technology to attack the problems of proper damping control on trucks and SUVS. The TREK MASTER combines TOKICOs multi-stage variable-aperture piston and sandwich valve system, with a new base valve design that provides a 4-stage dual blow-off compression cycle. What all of that means is, the TREK MASTER can provide a level of handling, traction, and ride quality unmatched by other shock absorbers. In addition to the very sophisticated damping system, TREK MASTER shocks feature a low mechanical drag rod guide and piston seal design. The result is a shock with as much as 65% less mechanical drag than other shocks. Smooth operation and long life are among the benefits The sophisticated oil-flow management system offers the capability to provide: