cat-back

Flowmaster 817640 - Force II Cat Back System

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$649.95

$722.95

You save: $73.00 (10%) off MSRP

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This part fits

  1. 2015 Chevrolet Silverado 2500 HD LTZ 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
  2. 2015 GMC Sierra 2500 HD Base 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
  3. 2015 GMC Sierra 2500 HD SLT 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
  4. 2015 GMC Sierra 2500 HD SLE 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
  5. 2015 Chevrolet Silverado 2500 HD WT 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
  6. 2015 Chevrolet Silverado 2500 HD LT 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
  7. 2013 Chevrolet Silverado 3500 HD 6.0L V8 cid:364 cc:5967 Crew Cab Pickup 78.8 in. bed
  8. 2013 GMC Sierra 3500 HD 6.0L V8 cid:364 cc:5967 Crew Cab Pickup 78.8 in. bed
  9. 2013 GMC Sierra 2500 HD SLT 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
  10. 2013 GMC Sierra 2500 HD SLE 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
  11. 2013 Chevrolet Silverado 2500 HD 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
  12. 2013 GMC Sierra 2500 HD WT 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
  13. 2012 GMC Sierra 2500 HD WT 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
  14. 2012 GMC Sierra 3500 HD 6.0L V8 cid:364 cc:5967 Crew Cab Pickup 78.8 in. bed
  15. 2012 GMC Sierra 2500 HD SLE 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
  16. 2012 GMC Sierra 2500 HD SLT 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
  17. 2012 Chevrolet Silverado 2500 HD 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
  18. 2012 Chevrolet Silverado 3500 HD 6.0L V8 cid:364 cc:5967 Crew Cab Pickup 78.8 in. bed
  19. 2011 Chevrolet Silverado 3500 HD 6.0L V8 cid:364 cc:5967 Crew Cab Pickup 78.8 in. bed
  20. 2011 GMC Sierra 2500 HD SLE 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
  21. 2011 GMC Sierra 2500 HD SLT 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
  22. 2011 GMC Sierra 2500 HD WT 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
  23. 2011 Chevrolet Silverado 2500 HD 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
  24. show all...
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About this product

Part #: 817640

Flowmaster Force II cat-back exhaust system for the 2011 to 2015 GM 2500HD and 3500HD extended cab and short bed truck is perfect for the person looking for mild to moderate sound levels with all of the performance benefits that you would expect from Flowmaster. This bolt on emissions legal system for the 6.0L V8 gasoline engines features a 50 Series Big Block muffler, mandrel bent 3.50 inch stainless steel tubing, and a polished 4.00 inch stainless steel tip with Flowmaster's logo embossed into it. The exhaust system is covered by Flowmaster's Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation.

More Details

Exhaust Pipe Bend TypeAssorted
Exhaust Pipe Max Diameter2.500 in.
Exhaust TypeSingle
Exit PositionSingle Side
Exit StyleStraight
Heat Shield AttachedNo
Inlet Diameter3.500 in.
Inlet Inside Diameter3.500 in.
MaterialStainless Steel
Muffler Count1
Muffler Part NumberKit Only
Muffler Series50 Series Big Block
Outlet Diameter3.500 in.
Outlet Outside Diameter4.000 in.
Single or DualSingle
Sound LevelMild/Moderate
System TypeCat Back
Tail Pipe Diameter3.500 in.
Tip Diameter4.000 in.
Tip Length10.000 in.
Tip Quantity1
TitleFlowmaster 817640 Cat-back System 409S - Single Side Exit - Force II - Mild/Moderate Sound
Tubing Diameter3.500 in.
Additional Documents
  1. Certificate of Originpdf
  2. Installation Instructionspdf
  3. Warrantypdf

See what our community says about flowmaster products

Logan Salazar

47

Logan Salazar
2011 Ford Mustang
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Much better sound and better performance
What were you trying to accomplish by adding this product?
Muscle car sound and look
Was it easy install? Any installation tips that will help others?
Definitely make sure to use lots of grease to slide the parts together and adjust
Once you’ve had a chance to use the product, did it meet your expectations?
It exceeded my expectations exponentially, the raspyness of the exhaust really makes the car stand out.
View on Logan's build
Johnathan Hirt

15

Johnathan Hirt
2015 Dodge Dart
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Price
What were you trying to accomplish by adding this product?
Better sound
Once you’ve had a chance to use the product, did it meet your expectations?
Good for the price
View on Johnathan's build
Trace Butcher

595

Trace Butcher
1979 Ford F-150
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Performance
What were you trying to accomplish by adding this product?
Sound
View on Trace's build
Christian Larsen

23

Christian Larsen
2015 Ford Mustang
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
Once you’ve had a chance to use the product, did it meet your expectations?
It sounds good, but drones a lot when on the highway.
Any additional comments?
Probably going to run a Borla Stinger S-Type soon.
View on Christian's build
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Morr aggressive sound
What were you trying to accomplish by adding this product?
Improved exhaust note
Was it easy install? Any installation tips that will help others?
Professionally installed
Once you’ve had a chance to use the product, did it meet your expectations?
Yes
View on Deandre's build
California prop 65 warningWARNING: Cancer and Reproductive Harm www.p65warnings.cs.gov

*Some manufacturer restrictions apply.

About Flowmaster

Manufacturer of performance exhaust systems, mufflers, cold air intakes, turbo boost modules, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 5 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels.

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