cat-back

Flowmaster 817640 - Force II Cat Back System

Name: Flowmaster 817640 - Force II Cat Back System (817640)
Brand: Flowmaster
SKU: 5b000285259b31d67f8870a2
Price: 649.95 USD
Availability: InStock

$649.95

$722.95

You save: $73.00 (10%) off MSRP

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This part fits

2015 Chevrolet Silverado 2500 HD LTZ 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
2015 GMC Sierra 2500 HD Base 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
2015 GMC Sierra 2500 HD SLT 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
2015 GMC Sierra 2500 HD SLE 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
2015 Chevrolet Silverado 2500 HD WT 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
2015 Chevrolet Silverado 2500 HD LT 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
2013 Chevrolet Silverado 3500 HD 6.0L V8 cid:364 cc:5967 Crew Cab Pickup 78.8 in. bed
2013 GMC Sierra 3500 HD 6.0L V8 cid:364 cc:5967 Crew Cab Pickup 78.8 in. bed
2013 GMC Sierra 2500 HD SLT 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
2013 GMC Sierra 2500 HD SLE 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
2013 Chevrolet Silverado 2500 HD 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
2013 GMC Sierra 2500 HD WT 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
2012 GMC Sierra 2500 HD WT 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
2012 GMC Sierra 3500 HD 6.0L V8 cid:364 cc:5967 Crew Cab Pickup 78.8 in. bed
2012 GMC Sierra 2500 HD SLE 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
2012 GMC Sierra 2500 HD SLT 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
2012 Chevrolet Silverado 2500 HD 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
2012 Chevrolet Silverado 3500 HD 6.0L V8 cid:364 cc:5967 Crew Cab Pickup 78.8 in. bed
2011 Chevrolet Silverado 3500 HD 6.0L V8 cid:364 cc:5967 Crew Cab Pickup 78.8 in. bed
2011 GMC Sierra 2500 HD SLE 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
2011 GMC Sierra 2500 HD SLT 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
2011 GMC Sierra 2500 HD WT 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed
2011 Chevrolet Silverado 2500 HD 6.0L V8 cid:364 cc:5967 Extended Cab Pickup 78.8 in. bed

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Authorized Dealer

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 Type	Assorted
Exhaust Pipe Max Diameter	2.500 in.
Exhaust Type	Single
Exit Position	Single Side
Exit Style	Straight
Heat Shield Attached	No
Inlet Diameter	3.500 in.
Inlet Inside Diameter	3.500 in.
Material	Stainless Steel
Muffler Count	1
Muffler Part Number	Kit Only
Muffler Series	50 Series Big Block
Outlet Diameter	3.500 in.
Outlet Outside Diameter	4.000 in.
Single or Dual	Single
Sound Level	Mild/Moderate
System Type	Cat Back
Tail Pipe Diameter	3.500 in.
Tip Diameter	4.000 in.
Tip Length	10.000 in.
Tip Quantity	1
Title	Flowmaster 817640 Cat-back System 409S - Single Side Exit - Force II - Mild/Moderate Sound
Tubing Diameter	3.500 in.

Additional Documents

See what our community says about flowmaster products

Logan Salazar

2011 Ford Mustang

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

2015 Dodge Dart

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

595

Trace Butcher

1979 Ford F-150

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

2015 Ford Mustang

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

Deandre Small

2016 Dodge Charger

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

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WARNING: 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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