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20011-2015 Duramax Flo Pro 4" Cat-Back Exhaust No Muffler


2011-2015 Duramax 4" Cat-Back Exhaust No Muffler (FLO-861)

Fits: 2011-2015 GM LML w/ 6.6L Duramax

The FLO-861 is a 4" Cat-Back Exhaust System by FLO-PRO for the 2011-2015 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. You'll notice fuel mileage improvement, increased torque, and you'll have a much better sounding 6.6L!


  • 4" Cat-Back Exhaust
  • No Muffler/No Bungs - Straight Pipe
  • Increased Torque & Fuel Mileage
  • Aluminized or Stainless Steel
  • Easy Installation

Part Number: FLO-861