Express Brake Xtreme S-CAM system for trailer brake systems adds more than 10 times greater bushing surface on brake S-Cam/bushing systems by converting the S-Cam and bushing into one long journal bearing. According to the company, the system greatly increases S-Cam and S-Cam bushing life, facilitates proper greasing and “drastically simplifies” the complex cam and bushing part numbers by using just 28 part numbers to fit most trailer axle configurations