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THE ultimate Lithium style battery compatible upgrade for your BMW Airhead's charging system is this 450w alternator kit.

Updated design with fewer components.

One kit fits ALL Airheads - no need to know the stator size.

Simple installation.

Detailed Installation Guide- see HERE

Lithium Battery compatible.

Will also work with AGM or Lead-Acid batteries with a slightly lower voltage regulation.

Mosfet R/R with voltage conditioners to manage voltage ripple and appropriate voltage regulation.


Ideal for any custom build for a clean simple and powerful electrical system.

All components mount in stock locations, no fabricating of brackets etc. required

EnDuraLast 4 High Output Lithium Charging System

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$599.99 Regular Price
$579.99Sale Price
  • The Kit includes all the components to replace your under-performing 240w BOSCH charging system. Featuring a Permanent Magnet Rotor which eliminates the brushes and potential rotor failure. The Hi-Output Stator produces significant AC voltage at lower RPM's not possible with the original system. The new lithium specific MOSFET regulator rectifier is specifically designed to mount under the front engine cover replacing the diode board for a clean, simple installation. With a combined Voltage Regu

  • Updates the BMW Airhead original, under-performing 20 amp (max) alternator and diode board with modern components.

    The critically important higher amperage output of this system at low engine RPM's allows use of lighting, heating and other accessories to be used without discharging the battery or overloading the original charging system.

    High-tech permanent magnet rotor will never overheat and short out. Brushless design eliminates worn out rotor slip rings and brushes.

    Eliminates "burnt out war

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