Prepare your semi to have Expertise Built In , with the OTR 12.25" / 16.5" Full Camshaft Repair Kit for Spicer that offers reliable air brake performance. With several components that seal and tighten an internal brake drum, this repair kit allows the camshaft to spread the brake shoes apart and generate friction to slow a vehicle. Manufactured with precisely-engineered accessories to prevent wear and offer long-term dependability. FleetPride is your First Click in Heavy Duty .