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Ford 6.4 Liter – 390 Amp – XP Series


SKU: f6-4-390xp Category: Tag:

Ford 6.4 Powerstroke Diesel, 390 Amp XP Series

P/N: F6.4-390XP

Amps @ road speed:     390 Amps

Amps @ Idle                    220 Amps

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.  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. 

When it comes to heavy-duty and commercial use, having a reliable alternator is essential.  Max-Amp alternators, the premier choice on the market for those who demand maximum power under the most challenging conditions.  Whether you need high amperage, operate in extreme heat or humidity, or require consistent power at both idle and road speeds, Max-Amp alternators are designed to meet your needs.

One of the standout features of Max-Amp alternators is their ability to handle high amperage (390 amps, in this case) demands, whether continuous or intermittent.  This makes them ideal for vehicles that require a constant supply of power for various accessories and equipment.  Additionally, these alternators are built to withstand extremely hot conditions, such as those found in locations like Death Valley or the mean summer streets of Las Vegas.  Their durable construction ensures that they can operate efficiently even in the harshest environments.

Furthermore, Max-Amp alternators excel at providing high amperage output at both idle and road speeds.  This means that regardless of whether your vehicle is stationary or in motion, you can count on a consistent and reliable power supply.  This feature is particularly beneficial for vehicles that need to run multiple electrical components simultaneously or for extended periods of time.

The XP series of Max-Amp alternators takes performance to the next level by utilizing DENSO components to achieve both the highest idle output and high RPM amperage output possible.  These alternators are designed with a larger housing while still maintaining OEM fitment, eliminating the need for any modifications during installation.  In addition to their impressive 390 amp power output, Max-Amp alternators also run cooler than other models on the market, which helps prolong their lifespan and ensures optimal performance over time.

So, if you are in need of a heavy-duty alternator that can deliver maximum power under challenging conditions, look no further than Max-Amp alternators.  With their superior performance, durability, and reliability, these alternators are the preferred choice for owners, service managers, and mechanics who demand only the best for their vehicles.  Upgrade to a Max-Amp alternator today and experience the difference firsthand.

Amps @ road speed:     390 Amps

Amps @ Idle                    220 Amps

This alternator is designed to be an exact factory replacement for the 6.4L Ford Powerstroke diesel engine and will directly bolt-on with no modifications necessary. 

A precision machined, hard anodized pulley made from Aircraft Certified 6061 aluminum is installed on each alternator for maximum output and durability. This XP series alternator comes with an unprecedented full two-year warranty.


Alternator picture is representative only

Weight 24 lbs


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