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Flowmaster 817654 - Header-back System 409S - Dual Rear or Side Exit - Moderate/Aggressive Sound

Name: Flowmaster 817654 - Header-back System 409S - Dual Rear or Side Exit - Moderate/Aggressive Sound (817654)
Brand: Flowmaster
SKU: 5b000288259b31d67f88733e
Price: 764.95 USD
Availability: InStock

$764.95

$898.00

You save: $133.05 (15%) off MSRP

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This part fits

1972 GMC C15/C1500 Pickup Base
1972 Chevrolet C10 Pickup Base 5.0L V8 cid:307 cc:5031
1972 Chevrolet C10 Pickup Base
1972 GMC C15/C1500 Pickup Base 5.0L V8 cid:307 cc:5031
1971 GMC C15/C1500 Pickup Base 5.0L V8 cid:307 cc:5031
1971 GMC C15/C1500 Pickup Base
1971 Chevrolet C10 Pickup Base
1971 Chevrolet C10 Pickup Base 5.0L V8 cid:307 cc:5031
1970 Chevrolet C10 Pickup Base
1970 Chevrolet C10 Pickup Base 5.0L V8 cid:307 cc:5031
1970 GMC C15/C1500 Pickup Base
1970 GMC C15/C1500 Pickup Base 5.0L V8 cid:307 cc:5031
1969 Chevrolet C10 Pickup Base 5.3L V8 cid:327 cc:5358
1969 GMC C15/C1500 Pickup Base
1969 GMC C15/C1500 Pickup Base 5.0L V8 cid:307 cc:5031
1969 Chevrolet C10 Pickup Base
1969 Chevrolet C10 Pickup Base 5.0L V8 cid:307 cc:5031
1968 Chevrolet C10 Pickup Base 5.3L V8 cid:327 cc:5358
1968 Chevrolet C10 Pickup Base 5.0L V8 cid:307 cc:5031
1968 GMC C15/C1500 Pickup Base 5.3L V8 cid:327 cc:5358
1968 GMC C15/C1500 Pickup Base 5.0L V8 cid:307 cc:5031
1967 GMC C15/C1500 Pickup Base 5.3L V8 cid:327 cc:5358
1967 GMC C15/C1500 Pickup Base 5.0L V6 cid:305 cc:5012
1967 Chevrolet C10 Pickup Base 4.6L V8 cid:283 cc:4638
1967 Chevrolet C10 Pickup Base 5.3L V8 cid:327 cc:5358

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Authorized Dealer

About this product

Part #: 817654

Flowmaster's American Thunder crossmember-back exhaust system for the 1967 - 1972 GM C10/C15 1/2 ton 2WD (Coil Spring) pickup truck is perfect for the person looking for moderate to aggressive sound levels with all of the performance benefits that you would expect from Flowmaster. This crossmember-back DOR/DOS (Dual Out Rear, Dual Out Side) system features dual Super 44 Series mufflers, 2.50 in. mandrel bent 409S stainless steel tubing and all the hardware necessary for a great fitting installation. (Stainless tips sold separately). This system is routed in a fashion that accommodates both long and short wheelbases with automatic or manual transmissions, and provides adequate clearance for substantially lowered vehicles. The exhaust system is covered by Flowmaster's Lifetime Limited Warranty.

More Details

Exhaust Series	American Thunder
Exhaust Type	Dual
Exit Position	Dual Out Side
Exit Position	Dual Out Rear
Exit Style	Straight
Heat Shield Attached	No
Inlet Diameter	2.500 in.
Inlet Inside Diameter	2.500 in.
Material	Stainless Steel
Muffler Count	2
Muffler Part Number	Kit Only
Muffler Series	Super 44 Series
Outlet Diameter	2.500 in.
Outlet Outside Diameter	2.500 in.
Single or Dual	Dual
Sound Level	Moderate/Aggressive
System Type	Header Back
Tail Pipe Diameter	2.500 in.
Tip Quantity	0
Title	Flowmaster 817654 Crossmember back 409S - Dual Rear or Side Exit - Moderate/Aggressive Sound
Tubing Diameter	2.500 in.

Additional Documents

See what our community says about flowmaster products

217

Michael Caffrey

2000 Chevrolet S-10

What made you choose this particular product?

It was recommended by the installer

Is this your first time buying from this brand? Did you consider other brands?

Yes

View on Michael's build

239

Robert Cochems

2014 Chevrolet Camaro

What made you choose this particular product?

LIKE: Aggressive sound, Black muffler, qp Cold starts, Chrome tips DISLIKE: Not much to dislike LABOR: Did it myself INSTALLATION: Step by step instructions, NOTE: make sure you measure and mark before you cut off old exhaust, Took around 3 to 5 hours (took my time) PERFORMANCE: Deep aggressive sound, allows more air to flow. RECOMMEND: I would RECOMMEND for those who are comfortable cutting exhaust, but professional installation also encouraged if you arent up for the challenge.

View on Robert's build

1.5k

Cameron Alexander

2004 Mercury Grand Marquis

What made you choose this particular product?

Its Flow master, so of course it sounds good and it doesn't have packing to wear out.

View on Cameron's build

233

Travis N

2004 Chevrolet Tahoe

Once you've had a chance to use the product, did it meet your expectations?

Yes

View on Travis's build

289

Nate Johnson

2006 Ford Mustang

What made you choose this particular product?

Previous owner installed it.

Is this your first time buying from this brand? Did you consider other brands?

Yes but it looks and sounds awesome!

Once you've had a chance to use the product, did it meet your expectations?

Sounds amazing for a v6

View on Nate'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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