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720 Flo-Pro 4" Cat-Back Exhaust (Duals) - GMC/Chevy 6.6L Duramax 2001-2007

SKU: FP720
Mftr. Part#: 720
Manufacturer: FloPro Exhaust
FloPro's 4" Cat-Back Duals Exhaust is a great OEM replacement which comes with 4" high-flow system with an in-line muffler from the catalytic converter back and gives you hassle-free installation for your 2001-2007 GMC/Chevy 6.6L Duramax truck.

PRODUCT DETAILS (click to expand)

Mftr. Part#720
Weight (lbs.):50.00 lbs.
Dimensions:20.00" x 12.00" x 48.00"

PRODUCT SPECS (click to expand)

Attribute nameAttribute value
Product TypeEngine Parts
BrandFlo Pro Exhaust
Truck Type/ModelDuramax
Includes Tip(s)No
Includes Muffler(s)Yes
Exhaust TypeCat Back Dual
FinishAluminized Steel


FloPro's 4" Cat Back Dual Exhaust is a high-flow system with an in-line muffler from the cat back and is designed to increase performance, lower EGTs and improve flow on your 2001-2007 GMC/Chevy 6.6L Duramax LB7/LBZ/LLY 2500HD/3500HD truck. This part includes all the required clamps, pre-weld contour bent hangers, and stronger flanges to ensure easy installation. This exhaust system replaces your restrictive OEM exhaust with a high flow system that will sound great, improve torque, fuel mileage, and throttle response.


  • 4"┬áCat-Back Dual Exhaust System
  • Hassle-free installation
  • Mounts to OEM Hangers
  • Aluminized Steel Tubing
  • Includes muffler
  • No bungs
  • Contour bent hangers
  • Retains for Cat for emissions
  • TorcTite clamps