GM 4 Pin Alternator – 390 Amp – XP Series

GM 4 Pin Alternator, 390 Amps, XP Series

P/N: GM-4-390XP

Max-Amp alternators are the premier alternator on the market.  They are designed for heavy-duty & commercial use and will provide maximum power under the most demanding conditions.  Whether your demands are for any of the conditions noted below, Max-Amp alternators will fill you needs.

• High amperage (continuous or intermittent demand)
• Extremely hot conditions (Death Valley hot)
• High amperage whether idling or at road speed
• High humidity, wet conditions, chemicals, etc.

This Max-Amp heavy-duty alternator generates more power normal driving speeds and more power at idle than the factory alternator used on the GM Vortec engine.  

OEM Alternator          Max-Amp Alternator

Amps @ road speed:                     145 amps                    390 Amps

Amps @ Idle                                     85 amps                     220 Amps

The XP series of Max-Amp 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.