2020-2022 Duramax Emissions Off Power Package

We've put together our most popular products and our staff favorites into one easy space for the 6.6L Duramax. Everything listed on this page will work together without issue. 
  
Whether you're looking for a single tune, or you're building a race truck; this page is a great starting point. Just select the parts you need, and add them to the cart at the bottom of the page. 
Choose your Tuning

The MPVI3 is the industry standard for tuning your 6.6L L5P. If you're looking for our recommendation for tuning your truck, this is it. 

Please be sure to input your VIN and Modifications at the bottom of the page so we can have the custom tuning written as soon as possible.

2020-2023 Duramax CCS MPVI3 Custom Tune Package-Tuning-Coopers Custom Solutions-Dirty Diesel Customs

MPVI3 w/ CSS Tuning

Package Includes:

  • HP Tuners MPVI3
  • 8 HP Tuners Credits
  • 5 Custom Tune Files
  • Canbus Harness (NOX Plugs)


    • Power Level:

    • Stock Delete
    • +45HP
    • +75HP
    • +90HP
    • +120HP

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    2020-2023 Duramax AMDP MPVI Custom Tune Package (2020-AMDP-L5P)-Tuning-AMDP-Dirty Diesel Customs

    MPVI3 w/ AMDP Tuning

    Unlock your L5P's true potential with AMDP Custom Tuning. These tune files will range from Stock Delete up to 150HP Race tunes.

    Package Includes:

    • HPTuners MPVI3
    • 8 Credits
    • 5 Custom Tune Files
    • Canbus Harness (NOX Plugs)


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    2017-2023 Duramax MPVI3 w/ GDP Custom Tuning-Tuning-GDP-Dirty Diesel Customs

    MPVI3 w/ GDP Tuning

    • You MUST order CAN Plug for your year range
    • Each option comes with the MPVI3 Device & 8 Credits
    • Single Tune, SOTF, or Multi-Tune 
    • Written specifically for Your Truck
    • Emissions On or Off 
    • 4 credits is enough to flash your ECM & TCM

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    ECM Unlock Method

    You will need to unlock the ECM in order to apply custom tuning onto your L5P. 

    Note:

    These unlocked ECM's will not be able to communicate with the GM Factory Tools, GM will not be able to flash or modify your ECM for recalls anymore.

    2017-2023 Duramax E41 ECM Upgrade Kit (ECM-00-L5P-K)-Unlock Cable-HP Tuners-Dirty Diesel Customs

    HP Tuners E41 ECM Upgrade Kit

    • Allows you to remotely unlock your L5P E41 ECM, making the ECM ready to apply custom tuning. 
    • Eliminates the need of having to remove the ECM  
    • Enables read, write, & special functions in the VCM Suite software using and MPVI2+ (with Pro Feature Set or MPVI3 Interface

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    2020-2023 Duramax EVOHT2 w/ ECM/TCM Unlock Tool (26401)-Tuner-Edge Products-Dirty Diesel Customs

    EVOHT2 w/ ECM & TCM Unlock Tool

    Allows you to flash your 2020-2022 L5P ECM without removing the ECM for an Unlock. 

    Features:

    • Allows in-vehicle unlocking of the ECM
    • No Cores to deal with
    • Saves the headache caused by swapping ECMs  

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    2017+ Duramax HP Tuners Modified E41 ECM-ECM-HP Tuners-Dirty Diesel Customs

    HP Tuners Modified E41 ECM

    With this ECM you gain full access to calibrate, log, and scan via the OBD2 Port with your MPVI2 and VCM Suite 4.3+. 

    Features:

    • Gain the ability to tune your 6.6L L5P.
    • Allows full access to calibrate, log, and scan through the OBD2 Port Via an MPVI2 and VCM Suite 4.3+
    • VCM Scanner, dealer diagnostic and other diagnostic tools will continue to function normally.

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    Add TCM Tuning

    Transmission Tuning (TCM Tuning) increases the line pressure, this puts more pressure on your clutch packs and prevents them from slipping which can cause excessive early wear on clutch disks.

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    2017-2023 Duramax MPVI2/MPVI3 CCS TCM Tuning Package-Tuning-Coopers Custom Solutions-Dirty Diesel Customs

    TCM Tuning

    Note: Please select the 2020-2022 TCM Tuning Package Option.

    The TCM Tuning will dramatically increase the drivability of your Allison by modifying and adjusting your shift points, line pressure, and increasing the holding capacity

    Features:

    • Increases drivability by adjusting shift points, line pressure, and increasing the holding capacity
    • Includes TCM Tuning
    • T87 or T93 TCM
    • 4 Credits (Required to flash)

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    Switches

    When selecting SOTF tuning, you have the ability to utilize the Cruise Control Method (Read More Here) which would be accessed via your steering wheel. If you prefer a manual toggle switch, be sure to add it below. If you do not select the manual toggle switch, your SOTF tuning will automatically default to the Cruise Control Method. 

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    2017-2022 Duramax 6 Position Switch (H-M04-00)-SOTF Switch-HP Tuners-Dirty Diesel Customs

    SOTF Switch

    • 5’ OBDII pass-through cable
    • Knurled aluminum switch knob and position dial
    • Six-position rotary switch

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    Add EGR Delete

    When purchasing delete tunes, the new programming will automatically close the existing EGR valve to prevent any gasses from being recirculated. This means you don't need to fully delete your EGR in order to reap the benefits. However, with this option, you are relying on the OEM EGR valve to maintain a seal that can cause issues if it starts to leak.

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    2020-2023 Duramax EGR Solution Package (L5P-EGR-A045)-EGR Delete-Dirty Diesel Customs-Dirty Diesel Customs

    2020+ Duramax EGR Delete

    Housekeeping

    Clears up room in your engine bay by fully removing the problematic EGR system, giving you that clean factory-look install that is topped off with our very own Dirty logo.

    Increased Performance

    Reduces carbon deposits in the intake which in turn decreases restriction, lowers EGT's, and gains a quicker turbine spool.

    Canadian Made

    Proudly made in Canada! 

    Long Lasting

    This kit has been made from CNC machined 6061 T6 Aluminum, T304 Stainless Steel, and then anodized to ensure long lasting quality.

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    These cannot be shipped to the USA.
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    Add 3.5" Downpipe

    We recommend adding the 3.5" L5P Downpipe to replace your crushed factory downpipe and DOC. It connects to your OE turbo outlet flange and mates with your OEM or aftermarket Race Exhaust System with a 4-bolt flange. Made of high polish stainless steel, It comes with a high-quality heat wrap kit. 

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    2017-2023 Duramax 3.5" L5P Downpipe (L5P-EXH-A004)-Downpipe-Dirty Diesel Customs-Dirty Diesel Customs

    DDC 3.5" L5P Downpipe

    Features:

    • Pre-Built Heater Hose Assemblies w/ Quick Connect Fittings
    • Stainless Steel Y-Bridge Port Block Off Plate
    • Stainless Steel Exhaust Manifold Block Off Plate
    • Mil-Spec Anodized Aluminum Thermostat Bridge Billet Block Off w/ O-Ring
    • 9th Injector Plug
    • Coolant Line Plugs & Caps
    • All Necessary Gaskets & Hardware
    • Proudly Made In North America

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    2017-2024 Duramax 3.5" Downpipe (WCF100129)-Downpipe-Wehrli Custom Fabrication-Dirty Diesel Customs

    WCF 3.5" Downpipe


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    Tuner Harness Plug Kit
    • Keeps water, dirt & debris out of your trucks harness 

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    2017-2021 Duramax Tuner Harness Plug Kit (GML5PKIT)-Tuner Harness Plugs-Shibby Engineering-Dirty Diesel Customs

    2017-2021 Tuner Harness Plug Kit

    • Keeps water, dirt & debris out of your trucks harness 

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    Add Exhaust System

    If you're 'delete tuning' your truck, you'll need an exhaust system. This is where you'll choose how loud you want your truck to be, you won't notice any power gains with a larger exhaust or straight pipe kit. It all comes down to preference here!

    Note: These Exhaust Systems are designed to fit all Wheelbase & Cab Configurations unless otherwise specified.

    2017-2022 Duramax 4" CAT & DPF Race Pipe - No Muffler (FLO-882)-Delete Pipe-Flo-Pro-431023-Dirty Diesel Customs

    4" Delete Pipe Exhaust Kit (No Muffler)

    Stock Appearance

    Retain the stock look and feel of your truck by only removing only the section of exhaust where the DPF & Catalytic Converter sits. Fits just like factory with OEM Flanges on each end.

     

    Retains Factory Tailpipe

    Flying under the radar? Add a Muffler and nobody will be the wiser until you put your foot into the throttle. Choose No Muffler if you're looking to add a little bit of noise to the truck without being obnoxious. 

     

    Factory Size

    The delete pipes include a 4 Inch Aluminized Steel Pipe that fits just like your factory exhaust system. 

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    2020-2022 Duramax 4" Downpipe Back Exhaust w/ Muffler (FLO-20141)-Downpipe Back Exhaust System-Flo-Pro-Dirty Diesel Customs

    4" Downpipe Back Exhaust w/ Muffler

    Muffler:
    It’s still going to bark when you get into the throttle, and when paired with a muffler it’s dulled down to a nice sound that is tolerable for diesel enthusiasts of all ages. 
     
    Full Replacement
    This is a complete 4" exhaust replacement from your downpipe back. These kits will not only sound great, but also increase your mileage while helping keep your EGT's low. 

    Great Sound
    This kit will make your truck a bit louder, while still keeping your neighbors friendly. A bit louder than factory but with a more aggressive exhaust note, these are great for street or track.

    Painless Installation
    These kits mount on your factory hangers and fits perfectly onto your factory downpipe. It's a very straight forward install, just drop your factory system and hang this kit in its place.

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    2020-2022 Duramax 4" Downpipe Back Exhaust - No Muffler (FLO-20141NM)-Downpipe Back Exhaust System-Flo-Pro-Dirty Diesel Customs

    4" Downpipe Back Exhaust - No Muffler

    Straight Pipe:

    Will give a great sound with little to no drone. 

    Full Replacement

    This is a complete 4" exhaust replacement from your downpipe back. These kits will not only sound great, but also increase your mileage while helping keep your EGT's low. 

    Great Sound

    This kit will make your truck a bit louder, while still keeping your neighbors friendly. A bit louder than factory but with a more aggressive exhaust note, these are great for street or track.

    Painless Installation

    These kits mount on your factory hangers and fits perfectly onto your factory downpipe. It's a very straight forward install, just drop your factory system and hang this kit in its place.

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    2020-2023 Duramax 5" Downpipe Back Exhaust - No Muffler (FLO-20151NM)-Downpipe Back Exhaust System-Flo-Pro-Dirty Diesel Customs

    5" Downpipe Back Exhaust - No Muffler

    Straight Pipe:
    It’s deep, it’s droney, and it turns heads 

    Aggressive Sound
    This kit is one of the loudest options for the Duramax, adding a muffler will help with highway drone but it will still produce deep and aggressive tones. 

    Dislike your Neighbors?
    Perfect. This is the exhaust for you.

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    Add Exhaust Tip

    Finish the look on your truck with an Exhaust Tip. These will bolt onto the end of your exhaust and have a dual-wall design for a clean finish.

    For more options go to Exhaust > Exhaust Tips in the navigation menu

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    Dirty Exhaust Tip (Trigger-Exhaust-Tip)-Exhaust Tips-Trigger Industries-Dirty Diesel Customs

    Dirty Trigger Exhaust Tip


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    Universal 4 to 5" Dirty Stainless Exhaust Tip (DDC-EXH-A054)-Exhaust Tips-Dirty Diesel Customs-DDC-EXH-A054-Dirty Diesel Customs

    5" Dirty Stamped Exhaust Tip

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    4" to 5" Dual Wall Angled Exhaust Tip (T5053)-Exhaust Tips-MBRP-t5053-Dirty Diesel Customs

    5" Exhaust Tip


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    4" to 6" Dual Wall Angled Exhaust Tip (T5072)-Exhaust Tips-MBRP-t5072-Dirty Diesel Customs

    6" Exhaust Tip

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    5" to 6" Dual Wall Angled Exhaust Tip (T5074)-Exhaust Tips-MBRP-t5074-Dirty Diesel Customs

    6" Exhaust Tip

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    5" to 7" Exhaust Tip - Rolled End O.D. (T5127)-Exhaust Tips-MBRP-T5127-Dirty Diesel Customs

    7" Exhaust Tip

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    Add an Intake

    Adding an intake isn't about power, it's about reducing the restriction, increasing efficiency, while maintaining strict filtration standards. These kits are offered with a Oil Cleanable Filter and Dry Disposable.

    The Oiled Filter is recommended for those that mainly use their trucks for City or Highway driving and would rather clean their filter instead of replacing it.

    The Dry Disposable is a better option if your truck frequently sees dusty environments or you'd rather toss out your filter instead of cleaning it.

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    2020-2023 Duramax S&B Cold Air Intake Kit (75-5136)-Intake Kit-S&B Filters-Dirty Diesel Customs

    S&B Cold Air Intake Kit


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    Summary