Reaper EFI Live Delete Tuner and 4" Exhaust Package for Duramax 6.6L LML 2015.5-16 Pickups

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Special Price $1,299.00 was $1,329.00

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Worry Free EFI Live Tuning & 4" Delete Exhaust


Punisher Reaper Delete Autocal:
4 Driveable Power Levels up to +150 HP*
Optional Switch-On-The-Fly Capability with Extra Power Level
Plug and Play Installation Custom Tuned for Your Truck Mods
Read & Clear Diagnostic Trouble Codes
Flo~Pro Race Delete Exhaust:
Replaces Exhaust from the Downpipe Back Deleting DPF, DEF & CAT Systems
4" Mandrel Bent Aluminized or Stainless Steel
Simple & Secure Installation Using OEM Mounts/Hangers - No Cuts or Welds
Optional 14"L x 8"D, Fiberglass Packed, Perforated Core Muffler
2015.5 - 2016 Chevy/GM 6.6L Duramax LML Diesel Pickup Trucks
* Exhaust is not suitable for Chassis Cab trucks or Regular Cab pickup trucks.
* Please ensure you have the late LML 3-bolt style flange from the turbo-direct pipe and not a V-band Clamp. If you have a V-band Clamp use 2011-15 parts.

IMPORTANT: Exhaust is NOT suitable for Chassis Cab or Regular Cab trucks. Please ensure you have the late LML 3-bolt style flange and not a V-band Clamp. If you have a V-band Clamp use 2011-15 parts.

Punisher Performance Reaper Race Autocal

The Reaper is our own signature series EFI Live autocal, loaded with custom tuning from Punisher Performance. This tuner features 4 different power levels with optional Switch-On-The-Fly (SOTF) capability. The SOTF upgrade also includes a fifth power level and DSP5 Switch!


  • Power up to +150 HP*
  • Allows Deletes of DPF, DEF & EGR Without Trouble Codes
  • Customizable and Updateable Tuning
  • Read and Clear Diagnostic Trouble Codes (DTCs)
  • Simple, Plug-n-Play Installation in minutes
  • Fully Reversible
  • Additional VIN Licenses Available

Full Customization

Not only is the tuner initially programmed to your specific truck as it is, but the truly great thing about these Autocals is that you can do so much more than just program! You can purchase additional tunes (from $100) and load them on the device, you can log data, and you can clear DTC's. For customers who frequently upgrade their truck, tunes and data logs can be exchanged with Punisher Performance via email!

Share your tunes

Each Autocal comes with one VIN license which allows you to tune one engine and one transmission. Additional VIN licenses can be purchased for $125, in case you trade trucks or have a friend who wants some tuning! Each device supports a max of 7 licenses.

Duramax 6.6L LML 2011 - 2016 Pickup Power Levels

Switch PositionPower LevelGains
1 Stock +0 HP
2 Economy +50 HP
3 Tow +70 HP
4 (Available with SOTF Upgrade Only) Mild +100 HP
5 Hot +150 HP*

* Maximum power gains require a lift pump.

Flo~Pro DPF, DEF & CAT Delete Exhaust Systems

Flo~Pro's Race Delete Exhaust Systems replace the entire exhaust from the downpipe back with 4" straight pipe. They do not require welding or modification and install easily using OEM mounts and hanger locations. A veteran Canadian manufacturer of truck exhausts, Flo~Pro has put decades of experience into every pipe they build, while offering affordable prices. Their longer, contoured welds on the hangers and machined flanges show they have learned from the mistakes many manufacturers still make.

  • The Steel: Mandrel Bent 4" Aluminized or Stainless Steel Tubing. Stainless Kits are stainless from top to bottom, even the welds.
  • Optional Muffler: The 14"L x 8"D, Fiberglass Packed, Perforated Core Muffler of the same material reduces noise without reducing power or flow.
  • Benefits: Increased HP and Torque, while reducing EGTs and eliminating "Regen" which results in increased engine efficiency.
  • Simple and Secure Installation: The exhaust bolts onto OEM mounts and hangers, requiring no cuts or welds. The kit includes all required hardware and will stay in place once installed.

More Information
Brand Punisher Performance
Diesel Engine Duramax 6.6L LML 2015.5-2016
OEM Make GMC, Chevrolet
OEM Model Sierra/Denali 2500, Sierra/Denali 3500, Silverado 2500HD, Silverado 3500HD
Specific Year 2016, 2015

Coupon Codes are entered on the shopping cart before going to checkout. If you have issues using the coupons, please contact us.

Exclusive Freedom Diesel Performance Discounts

Save $45 On Any Order Over $699 w/ Coupon Code SAVE45QUICK


All of our packages include multiple related items at a special package discount. Our packages are designed to make your life easier, usually including all the parts you need to achieve a specific modification.

Price Matching Beating!

We want to make sure you get the best deal possible on your parts. We do our best to ensure we have the best prices in the industy, however, if you find an item cheaper, let us know and we will happily match or beat the price.

Discounts For Shops & Dealers

If you are an installation shop or dealer, give us a call or email for details on our dealer program. We are able to discount most items for shops.

Phone: 855-432-4733 9 AM - 6 PM EST Monday - Friday
Email: [email protected]

We Strive For Extremely Quick Shipping.

Whether you need a part to fix a downed truck, a performance part to get the edge on your competitors on race day, or just something to improve the look or functionality of your vehicle; freedom diesel performance you covered!

We understand the only reason you are purchasing a part, is because you really need it or really want it. We do everything in our power to ensure you get the purchased item as soon as possible.

*** Orders placed before 2 PM Est - Usually ship the same day. ***

Estimated Delivery Times:

- Tuners / Programmers by themselves - 2 to 3 Business Days

- Performance / Race Packages - 2 to 5 Business Days

- General Diesel Performance Parts - 2 to 5 Business Days 

- Lighting, Accessories, Etc - 2 to 7 Business Days 

(Alaska / Hawaii Add 3 Business Days)

Easy Return / Exchange Process

If for some reason, you order the incorrect product, or do not need the product prior to using it, we will accept it back as a return for refund or exchange up to 30 days from delivery. Must be in new, un-used condition with original packaging.

Due to credit card processing fees, shipping, and wear and tear to the packaging often occuring during shipping, returns may be subject to a 20% restocking fee.

If you need to setup a return or exchange, please contact us for an RMA#

Warranty Process

If the product you receive is damaged or defective, please contact us immediately for assistance. In most cases, we can send you a return label and fix the problem very quickly.