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Flowmaster American Thunder Crossmember-Back Exhaust System 817934

Flowmaster American Thunder Crossmember-Back Exhaust System 817934
Flowmaster American Thunder Crossmember-Back Exhaust System 817934
$977.99 ea
NEWARRIVING SOONEstimated Ship Date 10/25/2023 (If Ordered Today)8 available from HOLLEY PERFORMANCE PRODUCTS as of 10/03/2023
Model: 4016804
Supplier has not provided any fitment data for this product.
This American Thunder exhaust system is specifically designed for 1967-1972 Ford F-100/F-250/F-350 2-wheel drive V8 trucks without a side mounted auxiliary fuel tank. The system is perfect for the person looking for an aggressive to moderate exterior and interior sound level. Starting just after a set of headers, this exhaust system comes complete with a built-in H-pipe crossover and all mandrel-bent 2.50-inch 409 stainless steel tubing that helps maximize the flow of the exhaust pulses for better performance and the added durability of stainless steel. The Super 44 Series performance mufflers will give any V8 a deep rumble with that classic Flowmaster tone. This system comes with your choice of three tailpipe exits, straight out the rear, side exit behind each rear tire, or dumped behind the rear tires. The system includes all hardware necessary for an at home installation. This exhaust system is covered by our Lifetime Limited Warranty. Fits both short and long wheelbase trucks.
  • Mandrel Bent Tubing
  • Super 44 Series Muffler
  • H-Pipe Style Crossover Pipe
  • Incl. All Necessary Hardware For Home Installation
  • 409 Stainless Steel Adds
  • Lifetime Limited Warranty
Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations

About Flowmaster

Manufacturer of performance exhaust systems, mufflers, performance 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. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.



California Proposition 65 Chemical Name Chromium (hexavalent compounds)
California Proposition 65 Required Yes
Emission Code 5
Exhaust Series American Thunder
Exhaust Type Crossmember Back
Exit Position Dual
Inlet Inside Diameter 2.500 in.
Material 409 Stainless Steel
Mount Type Uses New Hangers (Included)
Muffler Body Length (in) 13.25
Muffler Color Black
Muffler Finish Painted
Muffler Inlet Diameter 2.5
Muffler Inlet Location Centered
Muffler Material 409S Stainless Steel
Muffler Outlet Diameter 2.5
Muffler Outlet Location Offset
Muffler Overall Length (in) 19.5
Muffler Part Number Kit Only
Muffler Quantity 2
Muffler Series Super 44
Muffler Shape Oval
Muffler Type Welded Baffle
Part Type Exhaust System Kit
Single Dual Dual
Sound Level Aggressive / Moderate
System Type Crossmember-back
Tip Style Not Included
Tubing Diameter 2.500 in.
Tubing Diameter (in) 2.5
Tubing Material 409S Stainless Steel
WARNING CA Proposition 65 WARNING: Cancer and Reproductive Harm


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Flowmaster American Thunder Crossmember-Back Exhaust System 817934:
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