Products Showing Parts for — {{ }}

No Results Showing Parts for — {{ }}
USD 599
Part #: MG1234

Mean Green MG1234 High Output Alternator

2011-2019 GM 6.6L Duramax
Part #: MG1234
★★★★★ ★★★★★ 1 Reviews
Buy now, pay later using Affirm Logo during checkout.
Temporarily Out of stock - More on the way!

An Email Will Be Sent With Expected Shipping Date After Purchase

Our Recommendations Compatible Products
Scroll to View More


When you need increased charging capability, replace the stock alternator in your 2011-2019 GM 6.6L Duramax with the Mean Green MG1234 High Output Alternator. Providing up to 300% more power than stock, the Mean Green alternator can handle charging any engine, no matter what the power requirement is! Featuring a tool steel rotor shaft supported by heavy duty sealed bearings on each end, this alternator means business. Even the heavy duty solid copper windings are sealed with high temperature insulation. The heat resistant multi-function integrated regulator won't be susceptible to failure due to extreme temperatures like the factory unit is. Mean Green backs their high output alternators with a 1 year warranty.

  • 300 AMP Output
  • Superior Design
  • No Core Required
  • Tool Steel Rotor Shaft
  • Heavy Duty Sealed Bearings
  • Precision Balanced for Smooth Operation
  • Heat Resistant Multi-Function Integrated Regulator
  • 1 Year Warranty
Note: Image is for display purpose only. Product may be different than what is shown.

Vehicle Applications

2011 Chevy 6.6L LML Duramax
2012 Chevy 6.6L LML Duramax
2013 Chevy 6.6L LML Duramax
2014 Chevy 6.6L LML Duramax
2015 Chevy 6.6L LML Duramax
2016 Chevy 6.6L LML Duramax
2017 Chevy 6.6L L5P Duramax
2018 Chevy 6.6L L5P Duramax
2019 Chevy 6.6L L5P Duramax
2011 GMC 6.6L LML Duramax
2012 GMC 6.6L LML Duramax
2013 GMC 6.6L LML Duramax
2014 GMC 6.6L LML Duramax
2015 GMC 6.6L LML Duramax
2016 GMC 6.6L LML Duramax
2017 GMC 6.6L L5P Duramax
2018 GMC 6.6L L5P Duramax
2019 GMC 6.6L L5P Duramax


  • MFG. Number MG1234
  • Manufacturer Name Mean Green
  • Shipping Weight 15.00 lb.
  • Shipping Length 7 in.
  • Shipping Width 8 in.
  • Shipping Height 8 in.
  • Fuel Type Diesel
  • Warranty Yes
  • Warranty Info 1 Year
  • Prop 65 Prop 65 WarningWARNING: Cancer & Reproductive Harm -
  • Internal L0.00R0.00


★★★★★ ★★★★★
5.0/5 Stars out of 1 Reviews
High output altenater
This altenater looks good no issues with exact fit. Does the job. The xdp staff are very knowledgeable. Will do future buisness for my uogradrs to my diesel

Write a Review

Include Your Order Number For a Chance to Win a $100 Gift card

Overall Rating

Your Information

Email Address will not be made public.

Customer Photos

Customer Photos

See what others built Submit your photo

Questions and Answers

No questions about this product. Be the first to ask a question!

Ask a question about this product

Please allow up to 1 business day for reply.

More to Consider

Recently Viewed