MSD is widely known and respected for their top-quality ignition systems and components. MSD is known and respected for their "Advanced Power System" alternators and parts. These are outstanding quality alternators and have all of the following premium features: -CNC-machined billet aluminum housings with the universal "Slide-Loc" mounting system for a variety of applications. -Windings made from an elite material that has greater strength and current capability. -Special 50-AMP rectifier diodes for better control and to protect from high-voltage spikes. -Dual bearings that are capable of enduring high axial loads up to 20,000 rpm. -Available in single-wire and plug-in versions with 105-AMP, 130-AMP or 160-AMP output. -Regulator utilizes the latest in surface mount technology for better control, even in high-heat situations. These are the best alternators on the market and have specific Slide-Loc mounting kits, pulleys for V-belt and serpentine-belt applications and plug-in adapters for a variety of applications.