MBRP 4" Performance Series Downpipe Back Exhaust System 11-15 6.6L Duramax LML

  • $379.99



  • 4" Aluminized Steel Tubing
  • High Flow Performance Muffler
  • 1 Year Warranty

Not for sale or use in the state of California.


  • Installation of this exhaust system must be used in conjunction with a tuner/programmer specifically designed for preventing trouble codes that would otherwise come from running a competition (turbo back) type of exhaust system.
  • For OFF Road/Race Use Only
  • This kit is only intended for fitment on 2011 through early 2015 models.  This system will not fit 2015.5+ models that feature a three bolt flange at the base of the turbo direct pipe, only a v-band flange is intended for fitment.  If you have a 2015 model year, please verify.