Quality-Built Alternators are remanufactured for a perfect fit. Housings: 100 percentage blasted clean, all mounting threads inspected and re-tapped for easy installation and consistent torque. Terminals: 100 percentage OE-quality, high-temp insulators make connections secure and reliable. Quality-Built Alternators are re-designed to operate with every turn of the key for reliable performance. Rotors: electronically tested and coated with high di-electric insulation to ensure maximum durability and charging performance, Bearings: 100 percentage inspected or new, with high-temperature grease for reduced heat and friction, Stators: electronically tested for maximum insulation quality and phase balance, Rectifiers: 100 percentage load tested to ensure alternator durability and charging performance, Brushes and Springs: 100 percentage new to ensure long life and charging performance. Quality-Built Alternators are re-engineered to withstand the tough conditions of everyday driving. Pulleys: 100 percentage plated or powder coated for maximum corrosion protection, Slip Rings: precision polished for maximum output, Voltage Regulators: 100 percentage tested for correct operating voltage.