Air pipes and lines are critical components within a vehicle's air brake system, responsible for transmitting compressed air to actuators throughout the vehicle. Located between the air compressor, air dryer, reservoirs, and brake chambers, these pipes and lines deliver the pneumatic power needed for braking functionality in commercial vehicles and some passenger car applications. Typically constructed from reinforced rubber or durable plastic compounds, these lines must withstand high pressures and resist abrasion, cracking, and temperature fluctuations. Proper function is vital for safe and reliable braking performance. Examples within this category include MAN air pipes with part numbers like 51158015173, 51.15801-5017, and 51.15801-5018, as well as components from manufacturers like Wabco.