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GDP Tuning EFILive Autocal & 5" Downpipe Back w/No Muffler | 2007.5-2010 6.6L GM Duramax LMM


This performance package includes the Gorilla Tuning EFILive Autocal Tuner and Flo~Pro 5" downpipe back with no muffler for 2007.5-2010 GM 6.6L Duramax LMM 2500/3500 applications.

  • Deletes the DPF, CAT, and EGR
  • Shift on the Fly - 5 power levels up to +260HP
  • Requires DSP5 Switch for changing power levels
Availability: AutoCals are tuned to your specific vehicle after purchase, please allow 2-3 business days for order fulfillment.
Pricing: $973.99

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GDP Tuning EFILive AutoCal

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.

2001-2005 GM 6.6L Duramax tunes are configured in DSP-5 format. This configuration requires a DSP-5 switch or an Edge Insight Monitor for power level adjustment.

2006-2010 GM 6.6L Duramax tunes are configured in DSP-5 format. This configuration requires a DSP-5 switch for power level adjustment.

Power Levels


  • No Power: +20HP
  • Tow: +50HP
  • Street: +120HP
  • Performance: +175HP
  • Rampage: +260HP

Flo~Pro 5" Downpipe Back w/no Muffler | 634NM

  • Fits 2007.5-2010 6.6L GM Duramax LMM 2500/3500 EC-CC/SB-LB-Dually
  • Mandrel bent piping
  • Includes all mounting hardware
  • Easy installation with simple hand tools
  • Reduces EGTs
  • Increases HP/TQ

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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