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Flowmaster - Force II Cat Back System (817603)

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$679.95

$755.95

You save: $76.00 (10%) off MSRP

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  1. 2018 GMC Sierra 1500 SLT 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 78.8 in. bed
  2. 2018 Chevrolet Silverado 1500 High Country 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  3. 2018 Chevrolet Silverado 1500 LTZ 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  4. 2018 GMC Sierra 1500 Denali 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 78.8 in. bed
  5. 2018 GMC Sierra 1500 SLT 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  6. 2018 Chevrolet Silverado 1500 LTZ 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 78.8 in. bed
  7. 2018 GMC Sierra 1500 Denali 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  8. 2018 Chevrolet Silverado 1500 High Country 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 78.8 in. bed
  9. 2017 GMC Sierra 1500 SLT 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  10. 2017 Chevrolet Silverado 1500 High Country 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  11. 2017 Chevrolet Silverado 1500 High Country 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 78.9 in. bed
  12. 2017 GMC Sierra 1500 SLT 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 78.9 in. bed
  13. 2017 Chevrolet Silverado 1500 LTZ 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 78.9 in. bed
  14. 2017 GMC Sierra 1500 Denali 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  15. 2017 GMC Sierra 1500 Denali 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 78.9 in. bed
  16. 2017 Chevrolet Silverado 1500 LTZ 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  17. 2016 GMC Sierra 1500 SLT 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  18. 2016 GMC Sierra 1500 Denali 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  19. 2016 Chevrolet Silverado 1500 LTZ 6.2L V8 cid:376 cc:6162 Extended Cab Pickup 78.9 in. bed
  20. 2016 Chevrolet Silverado 1500 LTZ 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  21. 2016 Chevrolet Silverado 1500 High Country 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  22. 2016 GMC Sierra 1500 SLT 6.2L V8 cid:376 cc:6162 Extended Cab Pickup 78.9 in. bed
  23. 2015 GMC Sierra 1500 SLT 6.2L V8 cid:376 cc:6162 Extended Cab Pickup 78.9 in. bed
  24. 2015 GMC Sierra 1500 SLT 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  25. 2015 GMC Sierra 1500 Denali 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  26. 2015 Chevrolet Silverado 1500 LTZ 6.2L V8 cid:376 cc:6162 Extended Cab Pickup 78.9 in. bed
  27. 2015 Chevrolet Silverado 1500 High Country 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  28. 2015 Chevrolet Silverado 1500 LTZ 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  29. 2014 GMC Sierra 1500 SLT 6.2L V8 cid:376 cc:6162 Extended Cab Pickup 78.9 in. bed
  30. 2014 GMC Sierra 1500 SLT 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  31. 2014 GMC Sierra 1500 SLT 5.3L V8 cid:325 cc:5328 Crew Cab Pickup 69.3 in. bed
  32. 2014 Chevrolet Silverado 1500 LTZ 6.2L V8 cid:376 cc:6162 Extended Cab Pickup 78.9 in. bed
  33. 2014 Chevrolet Silverado 1500 LTZ 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  34. 2014 GMC Sierra 1500 SLT 5.3L V8 cid:325 cc:5328 Extended Cab Pickup 78.9 in. bed
  35. 2013 GMC Sierra 1500 SLT 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  36. 2013 GMC Sierra 1500 SLT 6.2L V8 cid:376 cc:6162 Extended Cab Pickup 78.9 in. bed
  37. 2013 Chevrolet Silverado 1500 LTZ 6.2L V8 cid:376 cc:6162 Extended Cab Pickup 78.9 in. bed
  38. 2013 GMC Sierra 1500 SLE 6.2L V8 cid:376 cc:6162 Extended Cab Pickup 78.9 in. bed
  39. 2013 GMC Sierra 1500 SLE 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  40. 2013 Chevrolet Silverado 1500 LTZ 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  41. 2013 Chevrolet Silverado 1500 LT 6.2L V8 cid:376 cc:6162 Extended Cab Pickup 78.9 in. bed
  42. 2013 Chevrolet Silverado 1500 LT 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  43. 2013 GMC Sierra 1500 Denali 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  44. 2012 GMC Sierra 1500 SLE 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  45. 2012 GMC Sierra 1500 SLT 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  46. 2012 GMC Sierra 1500 SLT 6.2L V8 cid:376 cc:6162 Extended Cab Pickup 78.9 in. bed
  47. 2012 Chevrolet Silverado 1500 LTZ 6.2L V8 cid:376 cc:6162 Extended Cab Pickup 78.9 in. bed
  48. 2012 Chevrolet Silverado 1500 LTZ 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  49. 2012 Chevrolet Silverado 1500 LT 6.2L V8 cid:376 cc:6162 Extended Cab Pickup 78.9 in. bed
  50. 2012 Chevrolet Silverado 1500 LT 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  51. 2012 GMC Sierra 1500 SLE 6.2L V8 cid:376 cc:6162 Extended Cab Pickup 78.9 in. bed
  52. 2011 GMC Sierra 1500 SLE 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  53. 2011 GMC Sierra 1500 SLE 6.2L V8 cid:376 cc:6162 Extended Cab Pickup 78.9 in. bed
  54. 2011 GMC Sierra 1500 SLT 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  55. 2011 GMC Sierra 1500 SLT 6.2L V8 cid:376 cc:6162 Extended Cab Pickup 78.9 in. bed
  56. 2011 Chevrolet Silverado 1500 LTZ 6.2L V8 cid:376 cc:6162 Extended Cab Pickup 78.9 in. bed
  57. 2011 Chevrolet Silverado 1500 LTZ 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  58. 2011 Chevrolet Silverado 1500 LT 6.2L V8 cid:376 cc:6162 Extended Cab Pickup 78.9 in. bed
  59. 2011 Chevrolet Silverado 1500 LT 6.2L V8 cid:376 cc:6162 Crew Cab Pickup 69.3 in. bed
  60. show all...
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About this product

Part #: 817603

This stainless steel bolt on exhaust system for the 2011 to 2018 GMC and Chevrolet 1500, crew cab / short bed and extra cab / standard bed with 6.2L engine uses Flowmaster's 50 Series Big Block muffler for a muscular exterior sound and 3.50 in. mandrel bent tubing throughout. The system features a polished, 4.00 in. embossed stainless tip and delivers noticeable performance gains while offering a moderate sound level inside and out. The system is a true bolt on with an OE style ball flange connection and it utilizes the factory exhaust hangers for easy at home installation. Flowmaster's lifetime limited warranty protects your investment for the life of the vehicle.

More Details

Exhaust SeriesForce II
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 LevelModerate
System TypeCat Back
Tail Pipe Diameter3.500 in.
Tip Diameter4.000 in.
Tip Quantity1
TitleFlowmaster 817603 Cat-back System 409S - Single Side Exit - Force II - 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

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?
The sound output. Just right
Is this your first time buying from this brand? Did you consider other brands?
Yes, No.
Was it easy to install? Any installation tips that will help others?
Vary easy and light weight. Be sure to install in in the right orientation or you will need to take it off and redo it. (dont ask)
Once you've had a chance to use the product, did it meet your expectations?
Exceeded them!
View on Michael'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?
upgrade
Is this your first time buying from this brand? Did you consider other brands?
yes
Was it easy to install? Any installation tips that will help others?
yes if you have a welder
Once you've had a chance to use the product, did it meet your expectations?
yes
View on DUCK4TWENTY'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?
It gives Chevy 3.8 liter a better exhaust sound
Is this your first time buying from this brand? Did you consider other brands?
I consider spintech mufflers
Was it easy to install? Any installation tips that will help others?
They were just welded in place
Once you've had a chance to use the product, did it meet your expectations?
yes
View on Donte'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?
Came with the car
Is this your first time buying from this brand? Did you consider other brands?
Yes
Was it easy to install? Any installation tips that will help others?
Don't know
Once you've had a chance to use the product, did it meet your expectations?
Never had any to begin with
Any additional comments?
A little highway drone
View on Bailey'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?
Bought mandrel bends, muffler and pipe from Jegs. Can't beat their pricing. They also sell the pre-bent Flowmaster tail pipe sections, which are worth the money.
Any additional comments?
Nice quiet muffler, what I was looking for.
View on Craig's build

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  • 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.

    Benefits of adding this mod

    An upgraded exhaust system is one of the easiest modifications that offers an immediate, noticeable performance improvement. Whether you’re cruising an M3 or modding a diesel truck, an upgraded exhaust will open up the restrictive factory system, allowing your engine to breathe better and deliver peak power! From lighter weight exhaust headers to improved cat-back systems, to better sounding mufflers, modifying your exhaust setup is a great place to express the character of your ride in a unique and cost effective way. Whatever you’re looking for in a modified exhaust system, we can provide the absolute best systems to make your vision a reality.

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    we ship worldwide!

    Based in California with 3 warehouses across the country, we’re sending out shipments everyday of the week, even Saturdays. Because your next mod shouldn’t have to wait.

    + FREE GROUND SHIPPING ON U.S. ORDERS OVER $99
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    Have a question? Ask an Expert!

    Finding the best parts can be tricky

    - but not to worry! Our team of experienced American Muscle, JDM, Euro, and off-road tuners are ready to answer your questions (as long as we’re not in the garage wrenching on our own builds).

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    Matt Farah

    Smoking Tire / The Drive

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    Thank you for all the help, really. You guys are awesome. This is all great info and I really appreciate everything you have done to help me with my build.

    James M.

    Ford Focus ST

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    Your customer service is wonderful. Thank you for taking care of this. My review will express all. Thank you!

    Wallace R

    Chevrolet Silverado 1500