2001-2007 GM 6.6L DURAMAX - 4" DOWNPIPE BACK

Part Number: FLO 801NM


  • $560.00 CAD
    Unit price per 

2001-2007 GM 6.6L DURAMAX - 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!



  • 4" Downpipe Back Exhaust
  • Ease of installation
  • Contour Bent Hangers
  • TorcTite® Clamps
  • Machined Turbo Flange
  • No Bungs
  • Aluminized Steel & Stainless Steel Options
  • With Muffler or Without Muffler Options
  • Single Side Exit


  • Fits 2001-2007 Duramax 6.6L Cab/Box Configurations: EC-CC/SB-LB-Dually

*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.*