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PPEI EFILive Autocal & 5" Downpipe Back | 6.6L GM Duramax LML 2015.5


This performance package includes the PPEI Custom Tuning EFILive AutoCal and Flo~Pro 5" Downpipe Back with Muffler for 2015.5 6.6L GM Duramax LML applications.

  • Deletes the DPF, CAT, EGR, & DEF systems without trouble codes
  • Swith-On-The-Fly HP Settings
  • More Power, Better Economy
Availability: AutoCals are tuned to your specific vehicle after purchase, please allow 2-3 business days for order fulfillment.
Pricing: $1,714.00

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PPEI EFILive AutoCal

Now Featuring Shift-On-The-Fly Tuning! Requires the purchase of a DSP5 switch.

Kory Willis, owner of Power Performance Enterprises, Inc. has proven himself as the most capable EFILive tuner in the industry for the LML Duramax's. By being the first in the industry to truly crack these trucks and push them to the limits, he has given himself quite a name. PPEI's is known for building horsepower but they also specialize in maximizing the efficiency and reliability of the everyday Duramax built for towing and daily driving.

The EFILive AutoCal device from PPEI comes pre-loaded with 5 tunes for your vehicle, the existing modifications you have on your vehicle paired with tuning options selected when purchasing will determine the exact combination of levels you receive, below are the 5 most popular HP settings.

Power Levels

LML power levels ( Stock Trans ): Engineered for trans safe tuning.

  • Level 1 Stock HP (Emissions Equipped, only provided for 2011-2014 vehicles)
  • Level 2 Optimized Stock +30HP
  • Level 3 Tow +60HP
  • Level 4 Street +100HP
  • Level 5 Hot +150HP
  • Level 6 Maxx Effort +200HP (requires you to have a lift pump)

Note* the 2015 + LML Duramax trucks will not come with a stock A_Flash file unless the file is requested. There is no fee for the A_Flash to be sent at a later date.

Please allow 2-3 business days for order fulfillment.

Transmission Tuning

Transmission Tuning ($299) is available on Allison A50 transmission which will help prolong the life of your 2011-2016 6.6L GM Duramax LML as well as give you some big performance boosts!

While the stock tune is perfect for the transmission line pressure, this is not so once you've tuned your rig and increased your max torque; the line pressure will be lower than what is needed. To prevent this we recommend TCM tuning to achieve maximum tuning benefits! This tuning features a more aggressive line psi slope which will model a torque curve 100% above stock. The line PSI is modified in such a way that the truck will still retain good mileage, yet hold high line psi--close to 300psi under full load.

Please note: TCM tuning is only available for LML's that run A50 transmissions model years 2011-2015 (not applicable to 2015.5+ models at this time). Please verify that your LML has an A50 transmission before purchasing!

Flo~Pro 5" Downpipe Back w/Muffler | 671

  • Fits 2015.5 6.6L GM Duramax 2500/3500 LML EC-CC/SB-LB-Dually
  • 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

NOTE: This is a custom tuned product. In various situations, you may receive an error code when attempting to load the AutoCal onto your vehicle. In most of these situations we will need to update your stock file. If you have any issues, please contact us with error code messages available so we may promptly resolve any issues you may be having.

Shipping Information

  • Item Requires Shipping
  • 33.0 lbs.
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