2017-2021 GM 6.6L DURAMAX L5P - 4" DOWNPIPE BACK

Part Number: FLO 880NM


  • $740.00 CAD
    Unit price per 

2017-2021 GM 6.6L DURAMAX L5P - 4" DOWNPIPE BACK

These exhaust systems are available in a 16 gauge aluminized steel or T409 Stainless. FLO~PRO has made the necessary changes to ensure easy installation as all our exhaust kits come with necessary clamps, preweld contour bent hangers, and stronger flanges. With this exhaust system you can expect increased performance, lower EGTs and improved flow. Allow your truck to breath with this FLO~PRO exhaust system. FLO~PRO, horsepower you can hear!



  • Ease of installation
  • Contour Bent Hangers
  • TorcTite® Clamps
  • No Bungs
  • Does Not Fit Regular Cab


  • 2017-2021 GM 6.6L DURAMAX L5P
  • Crew Cab - Short/Long/Dually
  • These kits will only fit models equipped with the OEM style 4-bolt flange off the downpipe!


*This product requires the use of aftermarket tuning. These parts are for use on non-registered race vehicles on closed-course competition events *Installing or using this part on any emission controlled vehicle ("street" or "off-road") may violate federal and/or state emissions laws and regulations.*