2011-2015 Duramax LML – Turbo Down Pipe – Black coated 3″ -GM8427

Code: GM8427


In Stock


The MBRP GM8427 3″ Turbo Downpipe provides a smoother flow from the turbo in your 2011-2015 GM 6.6L Duramax. Removing the restriction in the factory downpipe results in lower EGT’s and increased performance. The down pipe is relatively easy to install due to the precision bends that you’ve come to expect from MBRP.


  • Greater Heat Retention
  • 20% Greater Flow Over Stock
  • Richer Diesel Sound
  • Will Not Affect DPF or Urea System
  • Gains of +21HP & +24 Ft-lbs.

Model Specific

This part fits select models

Chev/GMCDuramax 6.6 LML2011
Chev/GMCDuramax 6.6 LML2012
Chev/GMCDuramax 6.6 LML2013
Chev/GMCDuramax 6.6 LML2014
Chev/GMCDuramax 6.6 LML2015
Chev/GMCDuramax 6.6 LML2016