12 heavy duty trucks and trailer parts, namely brake systems comprised of brakes, brake linings, brake hardware components, cam shafts and slack adjustors; powertrain systems comprised of clutches, clutch brakes, torque converters, drive lines, universal joints, power takeoffs, transmission and power dividers; wheel attachments comprised of oil caps, cap nuts and studs; air brake systems comprised of valves, air brake tubings, reservoirs, air brake hoses and air brake hose assemblies; dash fans designed for vehicles