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LS4 King

LS4 Billet Alternator Conversion Bracket

LS4 Billet Alternator Conversion Bracket

Regular price $249.99 USD
Regular price Sale price $249.99 USD
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No more countless hours chopping apart the OEM alternator bracket!

Whether you are a DIY type of enthusiasts or a full blown shop owner, chances are you've encountered the problematic factory LS4 alternator bracket. The OEM assembly accepts a compact 4-bolt 105amp alternator case specific to the LS4 applications. The factory bracket is extremely heavy and bulky, tipping the scales at 12lbs! The original bracket is ugly and interferes when installing most aftermarket intake manifold and fuel rail options.

LS4 King is excited to introduce an attractive and lightweight billet alternator conversion bracket for LS4 applications. This billet bracket is intended to work with the larger and more commonly available 2014-2018 GM Truck Alternators. The truck alternators also offer a significant increase in amperage supporting 150amps in default configuration. Many specialty manufacturers have units which can support in excess of 400amps.

Each kit comes with a billet alternator bracket, aluminum spacers and installation hardware. Alternator is NOT included.

The following part numbers represent alternators which have been verified to fit in-car. These numbers can be utilized to cross reference compatible units at your local parts store:

  • GM GENUINE 84143543 150 amp
  • ACDELCO 3342742A 160 amp
OEM Application List
2005-2008 Pontiac Grand Prix GXP 5.3L V8 
2006-2007 Chevrolet Monte Carlo SS 5.3L V8
2006-2009 Chevrolet Impala SS 5.3L V8
2008-2009 Buick Lacrosse Super 5.3L V8
Swap Application List
LSx Based Conversions Using Complete LS4 Accessory Drive


The LS4 King Belt Tensioner Kit is highly recommend when using this alternator bracket.    

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