Description
Fits
Year | Make | Engine |
2011 - 2013 | GM | 6.6L Duramax |
Flo - Pro Exhausts fit all wheelbase and cab configurations unless stated otherwise. The FLO - 660 is a top - notch 5' Cat - Back Exhaust System for 2011 - 2013 6.6L Duramax engines. If you want to ditch your stock parts and upgrade to high - performance, high - flow 5' piping from the cat - back, this is the perfect kit for you!
Just like other Flo - Pro Exhaust kits, it comes with all necessary clamps, pre - welded contour - bent hangers, and stronger flanges, making installation a breeze. You'll enjoy better fuel mileage, more torque, and a great - sounding 6.6L engine.
Part Number: FLO - 660
Features
- 5' Cat - Back Exhaust
- OEM Style 4 - Bolt Flange
- Comes with High - Flow Muffler
- Boosts Torque and Fuel Mileage
- Available in Aluminized or Stainless Steel
- No Bungs

Using this FLO - 660 5' Cat - Back Exhaust is easy. First, gather all the tools you need. Then, start by removing the stock exhaust components carefully. Next, use the provided clamps, pre - welded contour - bent hangers, and stronger flanges to install the new exhaust system. Make sure all connections are tight.
When using your vehicle with the new exhaust, enjoy the improved fuel mileage and increased torque. You'll also notice a better engine sound.
For maintenance, regularly check the clamps to ensure they're still tight. If you have the aluminized version, keep an eye out for any signs of rust and clean it as needed. For the stainless - steel version, it's more resistant to corrosion, but still, give it a visual inspection from time to time. Avoid hitting the exhaust on rough terrain as it could damage the pipes or the muffler.