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Flowmaster 817673 - American Thunder Crossmember-Back Exhaust System

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$663.95

$737.95

You save: $74.00 (10%) off MSRP

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This part fits

  1. 1967 Chevrolet Chevy II 5.3L V8 cid:327 cc:5358
  2. 1967 Chevrolet Chevy II 4.6L V8 cid:283 cc:4638
  3. 1966 Chevrolet Chevy II 5.4L V8 cid:327
  4. 1966 Chevrolet Chevy II 5.3L V8 cid:327 cc:5358
  5. 1966 Chevrolet Chevy II 4.6L V8 cid:283
  6. 1966 Chevrolet Chevy II 4.6L V8 cid:283 cc:4638
  7. 1965 Chevrolet Chevy II 5.3L V8 cid:327 cc:5358
  8. 1965 Chevrolet Chevy II 4.6L V8 cid:283 cc:4638
  9. 1965 Chevrolet Chevy II 4.6L V8 cid:283
  10. 1965 Chevrolet Chevy II 5.4L V8 cid:327
  11. 1964 Chevrolet Chevy II 4.6L V8 cid:283 cc:4638
  12. 1964 Chevrolet Chevy II 4.6L V8 cid:283
  13. 1963 Chevrolet Chevy II 4.6L V8 cid:283 cc:4638
  14. show all...
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About this product

Part #: 817673

Flowmaster's American Thunder Crossmember-back exhaust system for the 1962-1967 Chevrolet Chevy II/Nova is perfect for the person looking for an aggressive sound level inside and outside of the car, with all of the performance benefits that you would expect from Flowmaster. This bolt-on DOS (Dual Out Side) system features stainless steel Super 44 Series mufflers and dual 2.50" 409S Stainless Steel tailpipes and a welded H-Pipe. Like all Flowmaster systems, the pipes are all mandrel bent to reduce any restrictions and maximize performance. 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

Catalytic Converter IncludedNo
ColorBlack
Exhaust SeriesAmerican Thunder
Exhaust TypeDual
Exit PositionDual Side
Exit StyleStraight
Heat Shield AttachedNo
Inlet Diameter2.500 in.
Inlet Inside Diameter2.500 in.
MaterialStainless Steel
Mount TypeFlanged
Muffler Count2
Muffler Part NumberKit Only
Muffler SeriesSuper 44 Series
Muffler TypeWelded Baffle
Outlet Diameter2.500 in.
Outlet Outside Diameter3.000 in.
ShapeOval
Single or DualDual
Sound LevelModerate/Aggressive
System TypeCrossmember Back
Tail Pipe Diameter2.500 in.
Tip Edge StyleRolled
Tip FinishPolished
Tip Length4.750 in.
Tip LogoEmbossed
Tip MaterialStainless Steel
Tip Quantity2
Tip TypeSingle Wall
Tubing Diameter2.500 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?
Sound, makes the car super loud and I love it
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 I'm a mechanic by trade so I just did it myself
Once you've had a chance to use the product, did it meet your expectations?
Yes good price for what your getting
View on Nick'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?
Other exhaust clips with this muffler on the 2.4L engine. I preffered a custom dual exhaust with two of these over pre made catbacks.
Is this your first time buying from this brand? Did you consider other brands?
First!!!
View on Paul'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?
Had a friend at a automotive shop that took it off a customers car and was going to throw it away, so I was offered it for $100.
Is this your first time buying from this brand? Did you consider other brands?
Yes. I was actually looking at Gibson exhaust but I couldn't pass up the deal.
Was it easy to install? Any installation tips that will help others?
Easy install. Cutting is required on the factory exhaust and it's a little awkward to remove the stock exhaust by yourself.
Once you've had a chance to use the product, did it meet your expectations?
It's loud and drones some but with a manual you can keep the rpm in the right range to avoid this. Sounds great, almost like a VQ from a 350Z/370Z but a little raspier.
View on Jake's build
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
Any additional comments?
Stock exhaust, cut a 12in section off after the cats which are gutted. Love the sound, love the look of the exhaust tips so 90% of the exhaust is still intact.
View on Skylar'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?
Despite for a little 4 cylinder it sounds good
View on Chris'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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