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H&S Performance XRT Pro Xtreme Race Tuner & 4" Downpipe Back | 2011-2014 6.6L GM Duramax LML | No Muffler, No Bungs


This H&S Performance package includes the XRT Pro Race Tuner and 4" Downpipe Back No Muffler, No Bungsfor 2011, 2012, 2013, & 2014 6.6L GM Duramax applications and features four power levels ranging from stock to 175HP.

Pricing: $1,126.00

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H&S Performance XRT Pro Xtreme Race Tuner | 109005

Power Levels

  • Level 1: 0HP
  • Level 2: 60HP
  • Level 3: 120HP
  • Level 4: 175HP


  • Comes preloaded with DPF Present and DPF Removed capable tuning
  • Allows removal of the DPF system and ALL related sensors (nothing needs to go into the race exhaust or even be plugged in)
  • Precisely tune engine with HP increases of 0-250HP (dependent on application, see below chart)
  • Speedometer recalibration for use of non-stock size tires or gearing
  • Enable/Disable factory "special features"
  • Remove/Adjust top speed limiter
  • Allows removal of the entire EGR system including cooler with no trouble codes
  • Turn off the EGR system without removing ANY parts
  • Read/Clear Diagnostic Trouble Codes
  • Custom Tunes are FREE to download
  • Internet updateable w/included Micro SD Memory Card and USB Adapter
  • Made in the USA

Flo~Pro 4" Downpipe Back with No Muffler, No Bungs | 864NM

  • No Muffler, No Bungs
  • 100% Aluminized Kit
  • Deletes Diesel Particulate Filter
  • Eliminates Pyrometers & Air Lines
  • Increases Horsepower
  • Increases Torque
  • Increases Fuel Efficiency
  • 100% Satisfaction Guaranteed
  • Bolt-On kit w/ All Necessary Piece

WARNING! These products are capable of disabling emissions equipment. If using DPF/EGR removed tuning, these high performance products are intended SOLELY for offroad use or closed-course racing use.

Shipping Information

  • Item Requires Shipping
  • 33.0 lbs.
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