Mechman Alternators 9050320

320 Amp S Series Alternator for Custom and Racing Applications

This unit requires you to build a custom alternator bracket and is not direct fit. Mechman Alternators are built to order: new or used product can not be returned. Any defect will be remedied directly through the manufacturer. We invite you to call and speak with our Sales Specialists so we can ensure you have the right solution for your vehicle!

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Mechman S Series Alternators

The S series family of alternators offers large case alternator performance in a compact package. Highly efficient, these 6 phase alternators use less horsepower per Kilowatt than conventional 3 phase alternators. 12 press fit diodes, twin rectifier plates, and highly efficient twin internal cooling fans make them durable in any application. Smaller, lighter rotors and reduced rotating resistance make them an excellent choice for high RPM or racing applications. Like their big brothers in the Elite series, the S series have hairpin stators and high pole count rotors that create much less Electromagnetic noise than conventional 3 phase alternators.

warning label

Installation Note: The Mechman Alternators 9050320 is a Universal Application Alternator. As such, it is intended to be part of a custom install and is not intended to simply drop into any specific vehicle without modification(s). The SonicElectronix Vehicle Fit Guide does not guarantee compatibility between your vehicle and this product. SonicElectronix cannot assume responsibility for an installer's inability to integrate the alternator into a given vehicle. Please seek a hands-on professional installer's advice before moving forward with the purchase of this product.

General Features:

  • 320 amp universal alternator
  • Cast aluminum construction
  • Cutting edge 6 phase hairpin epoxy reinforced stator technology
    • Improves durability
    • Increases high RPM stability
  • Oversized charge post ensure sturdy cable connections
  • Premium low-drag bearings
  • Ultra precision balanced rotor
    • Provides 20,000 RPM capability
  • Twin solid copper rectifiers with 12 press fit high amp diodes to spread out heat
  • 15% more efficient than typical alternators
    • Wastes less horsepower in the form of heat
  • Precision pulley machined from bar stock
  • Authorized Internet Dealer
  • 2 Year Manufacturer's Warranty

Compatibility List

  • Universal
  • Custom/Racing

This unit has a self exciting internal voltage regulator that does not require anything to be plugged into the alternator.

The installation of this unit will cause the "check battery" light to stay on in the dash.

This unit will more than likely not charge below 800 engine RPM on these vehicles.

Not Sure Which Alternator Fits Your Vehicle?

Check the Mechman Alternators Vehicle Fit Guide to find the right alternator for your vehicle!

Product Specifications

Amperage Output
Compatible Vehicle Make and Model
The model of vehicle that this vehicle specific product is designed for. Please keep in mind that engine variations can affect the compatibility of the products.

Warranty and Return Policy

Parts Warranty Duration
2 years
Labor Warranty Duration
2 years
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

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Average Attribution Rating

Accessory Tools and Products

Accessories added

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Browse 4 questions and 6 answers
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Why did you choose this?
Sonic Electronix Store
because they said it will fit my car, when other people say it doesn't, so lets hope their system works better then peoples brains XD haha they are pretty awesome and are usually right, 5 star service
Jesse W on Jun 30, 2015
Mechman Alternators 9050320 • 320A High Output Cast Aluminum Universal Alternator
will this fit my 2002 Audi 4.2 quattro V8?
Robert S on Jan 19, 2015
Best Answer: Hello Robert,

Universal intends to imply that the alternator is supposed to be Made to fit. It will not 'drop in'. Moreover, because it is a Universal Fit product, there isn't a compatibility list. If fabrication is not an intended approach, please contact the manufacture for an alternate solution.
Reply · Report · Customer SStaff on Jan 19, 2015
· Add Answer · I Have This Question Too (2)
Can this be used to isolate self-exciting alternators from batteries? I don't want them to be active all the time.
Alex P on Sep 23, 2015
Mechman Alternators 9050320
Mechman Alternators 9050320
Best Answer: Alex,
As this is nothing more than a beefy relay, it absolutely can be used to isolate an alternator (or any other electrical device) so long as it does not exceed the relay's continuous power handling capability (500 Amps in the NVX BIR 500). You would be hard pressed to find an alternator that exceeds 500 Amps though.
Reply · Report · JULI H on Sep 24, 2015
· Add Answer · I Have This Question Too (0)
What fuse i have to install between alt+ to bat+ ? The alternator is 320amp so 350A anl fuse will be ok? Also the better is to insta;ll the fuse near to alt+ or near to bat+?
Chris on Jun 9, 2016
· Add Answer · I Have This Question Too (0)

Product Summary


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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Mechman Alternators 9050320

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Mechman Alternators 9050320

320 Amp S Series Alternator for Custom and Racing Applications


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MechMan Alternators BIG3

Premium Zero Gauge "Big 3" Cable Upgrade Kit


Mechman Alternators 1020R

Secondary Battery Installation Kit for Audio Systems up to 4000 Watts



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