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GDP Tuning EFILive Autocal and 5" Downpipe Back w/Muffler | 2015+ 6.6L GM Duramax LML


This performance package include GDP Tuning's EFILive Autocal & Flo~Pro 5" downpipe back with muffler, no bungs for 2015-2016 6.6L Duramax LML applications.

  • Deletes the DPF, CAT, DEF, and EGR without trouble codes
  • 5 power levels up to +230HP
  • Important Note: Tuner is non-returnable due to being vehicle specific
  • Important Note: Fits 2011-2015 6.6L 2500/3500 LML EC-CC/SB-LB-Dually
Availability: AutoCals are tuned to your specific vehicle after purchase, please allow 2-3 business days for order fulfillment.
Pricing: $1,474.99

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GDP Tuning EFILive AutoCal | 2011-2016 6.6L GM Duramax LML | R1116DGP

How it Works

Because this tuning is custom made for your specific needs and modifications, the Gorilla EFILive AutoCal will not come pre-loaded. Each unit ships with easy-to-follow instructions that include a login, password and unique order number to use on the Gorilla website. You will be directed to an online portal where you will be asked for information about your truck. This information includes VIN number, modifications and more. Once these fields are filled out and the form is submitted, the experts at Gorilla will build tuning specifically for your truck.

Within 48 hours (business days) you will receive the tunes via email. From there you can load the tunes onto the AutoCal and then into your truck. Each tuner ships with unique information. For this reason, the above process cannot be completed until you physically have the Gorilla AutoCal.

2011-2016 GM 6.6L Duramax tuning comes as 5 separate files. To change power levels you must re-program your vehicle with the AutoCal.

Power Levels

  • No Power: +20HP
  • Tow: +50HP
  • Street: +75HP
  • Performance: +130HP
  • Rampage: +230HP

RAMPAGE requires a lift pump in order to see the full 230HP increase.

Flo~Pro 5" Downpipe Back with Muffler, No Bungs | 671

  • Fits 2015+ 6.6L 2500/3500 LML EC-CC/SB-LB-Dually w/OEM Flange
  • With 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 Pieces

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.
  • W9.0000” x H7.0000” x L5.0000”