2015.5-2016 Duramax 4" Downpipe Back Exhaust - No Muffler (FLO 871NM)-Downpipe Back Exhaust System-Flo-Pro-FLO-871NM-Dirty Diesel Customs

2015.5-2016 Duramax 4" Downpipe Back Exhaust - No Muffler (FLO 871NM)


Part Number: FLO-871NM

Mfr Part Number:

Sale price$870.00 CAD

This product ships for free to most Canadian locations! Learn more.
(show all inventory)
Available at alternate warehouse - contact for price
This is a special order item, please allow for additional processing time. If you would like an ETA, please reach out prior to placing your order.


These cannot be shipped to the USA. Learn more
We are unable to ship this product to P.O. boxes Learn more


 Year Make Engine
GM Duramax & 3-Bolt Flange at Downpipe

Flo-Pro Exhausts are designed to fit all wheelbase & cab configurations unless otherwise specified.

The FLO-871NM is a 4" Downpipe-Back Exhaust System by FLO-PRO for the 2015.5-2016 6.6L Duramax. It's the perfect kit if you're looking to remove your stock components and replace it with high-performance & high-flow 4" piping from the Downpipe back! Just like all of Flo-Pro's Exhaust kits, it will come with all the required clamps, pre-weld contour bent hangers, and stronger flanges to help you cruise through the installation process. You'll notice fuel mileage improvement, increased torque, increased flow and lower EGT's, not to mention you'll have a much better sounding 6.6L!
Part Number: FLO 871 NM
  • 4" Downpipe Back Single Exhaust system
  • No Muffler - Straight Pipe
  • Aluminized or Stainless Steel
  • Single Side Exit
  • Easy Install - Mounts to OE Hangers
  • Some older Duramax trucks have a V-Band Style Clamp rather than the 3-bolt flange. This kit ONLY will work with the 3-Bolt Flange Style off the turbo direct pipe