The available OEM alternators for the GM Vortec Engines are rated up to 145 Amps and only produce 85 Amps at idle. This heavy-duty alternator generates a maximum of 390 Amps at normal driving speeds and produces 220 Amps at idle. With this alternator, you are gaining 135 Amps at idle and up to 245 Amps at cruising speeds.
The XP series of SBC alternators are assembled using DENSO components and produce the highest idle output. They feature larger housing while still retaining OEM fitment without any modification required. They run cooler and are virtually indestructible. This alternator is designed to be an exact replacement to the OEM alternator for the 2006 and newer GM Vortec Engines with RVC regulator technology. A precision machined, hard anodized pulley made from Aircraft Certified 6061 aluminum is installed on each alternator for maximum output and durability.
This alternator comes with an unprecedented full two year warranty.