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GDP Tuning EFILive Autocal and 4" Downpipe Back No Muffler | 2013-2017 6.7L Cummins


This performance package includes GDP Tuning's EFILive Autocal and Flo~Pro 4" aluminized downpipe back with no muffler and no bungs for 2013-2017 6.7L Cummins applications.

  • Deletes the DPF, CAT, DEF, and EGR without trouble codes
  • Shift on the Fly - 4 power levels up to +130HP
  • Important Note: Tuner is non-returnable due to being vehicle specific
  • Important Note: Requires Bully GT to unlock the ECM
  • Cannot adjust the tire size
Availability: AutoCals are tuned to your specific vehicle after purchase, please allow 2-3 business days for order fulfillment.
Pricing: $1,278.99

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GDP Tuning EFILive AutoCal | 2013-2017 6.7L Cummins | R1316CGP

How to Unlock Your 2013-2017 6.7L Dodge Cummins ECM

In order to "Flash" your 2013-2016 6.7L Cummins you will need to purchase the Bully Dog 40420 GT Tuner and the Bully Dog 42214 Unlock Cable. Combining these two items will allow you to "unlock" your ECM to accept the custom tuning. These items must be purchased in addition to this AutoCal and can be added to your order via the product options.

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.

Power Levels

  • No Power: +20HP
  • Tow: +60HP
  • Street: +90HP
  • Performance: +130HP

Flo~Pro 4" Downpipe Back Single Exhaust System No Muffler | 1873

  • Fits 2013-2017 Dodge Cummins 6.7L, 2500/3500, Pickup
  • Fits RC-QC-MC/SB-LB-Dually
  • Aluminized 4" Downpipe Back Exhaust Kit No Muffler
  • Deletes Diesel Particulate Filter, Catalytic Converter
  • No welding necessary, completely bolt in


  • Increased Flow
  • Increased MPG
  • Improved Horsepower
  • Improved Torque

These components have been designed and are intended for closed course competition only! It becomes the sole responsibility of the Customer to ensure that the use of their vehicle and items purchased comply with federal, state, and local regulations. Performance products are legal in California only for sanctioned closed course racing vehicles, which may never be used on a public highway. Customer assumes all risks and expenses relating to unlawful vehicle operation on public roads.

Shipping Information

  • Item Requires Shipping
  • 17.0 lbs.
  • W9.0000” x H7.0000” x L5.0000”