Fits 2011-2021 5.7L Ram Hemi Trucks: 370 Amp Output Voltage Compatible with 12V Systems Includes Serpentine Style Pulley Internal Regulator Integrated Crafted for 2011-2021 5.7L Ram Hemi Trucks, this 370 Amp Alternator offers high output and compatibility with 12-volt systems. It comes with a serpentine-style pulley and an internal regulator. Note that it arrives with a smaller 1.75-inch diameter alternator pulley, requiring a slightly shorter drive belt for proper tension. Not suitable for sustained use above 5,000 RPM. This direct bolt-in replacement for the OEM alternator delivers over 200 amps at idle and 370 amps at cruising speed, featuring hairpin 6 phase technology and 12 robust press fit diodes for superior durability. A slightly shorter belt than stock may be needed for installation.