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Flowmaster®
817663 American Thunder Series Cat-Back Exhaust System, Made of Stainless Steel

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$809.95
$1,000.00Save: $190.05(19%)
Manufacturer #817663
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1

Highlights

Part:
Exhaust System
Brand:
Flowmaster
Notes:
Includes Super 40 Series Muffler
Material:
Made of Stainless Steel
Series:
American Thunder Series
System Type:
Cat-Back
Quantity Sold:
Kit
Warranty:
Lifetime Flowmaster Limited Warranty
Prop 65 Warning:

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Exit Location:
Exit: After Rear Tire (Split Rear or Split Side)
Main Piping Diameter:
2.5 in. Main Pipe
Product Fit:
Direct Fit
Recommended Use:
OE Upgrade
Why Buy:
Aggressive Tone Chambered Muffler

Vehicle Fitment Information

Vehicle Name
Submodel
Engine
Fitment Information
1998-2000 Ford F-150
Base
8 Cyl 4.6L
78.0 in. Bed
1998-2000 Ford F-150
Base
8 Cyl 5.4L
78.0 in. Bed
1998-2003 Ford F-150
Lariat
8 Cyl 4.6L
96.0 in. Bed
1998-2003 Ford F-150
Lariat
8 Cyl 5.4L
96.0 in. Bed
1998-2003 Ford F-150
XL
8 Cyl 4.6L
96.0 in. Bed
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Product Information

FLOWMASTER AMERICAN THUNDER AGGRESSIVE TONE CHAMBERED MUFFLER EXHAUST SYSTEMS

Flowmaster’s American Thunder aggressive tone chambered muffler exhaust systems include mandrel-bent steel tubing and a chambered muffler that’s fine-tuned to deliver improved torque, horsepower and gas mileage, plus the moderately aggressive rumble you crave for your street machine. Flowmaster, known as ‘the exhaust technology company,’ is a leading manufacturer of performance exhaust systems, respected for their design, innovation and engineering.

  • MADE IN USA
  • Offered in aluminized or stainless steel
  • Chambered muffler fine-tunes exhaust tone to moderately aggressive rumble
  • Mandrel-bent tubing allows for continuous airflow
  • Quick and easy installation
  • Direct fit by vehicle year, make and model
  • Proven to improve torque, throttle response, horsepower and fuel economy by rigorous dyno testing
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Warranty Policy
Right parts, guaranteed. If you find any defects, let us know within 60 days and we’ll take care of it. Check out our Warranty Policy for more details.
Shipping Policy
We ship fast so you can get on the road that much faster. Check out our Shipping Policy for more details.
Easy Return Policy
We’re only happy if you’re happy. If you’re not entirely satisfied with your order, you may be entitled to a refund. Check out our Return Policy for more details.

Customer Reviews

American Thunder Series Cat-Back Exhaust System, Made Of Stainless Steel
Perfect fit
Bought this a couple months ago to replace a single exhaust on my truck. When mated to the new headers, there were no problems with fit anywhere under the truck. Some adjustments to pipe length were necessary but this was expected. Customer service rep who engineered the entire system did an excellent job.
Purchased on Oct 28, 2016