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American Thunder Aggressive Tone Chambered Muffler Exhaust Systems — 17421 Flowmaster

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List Price: $344.68 $263.68 Save: $81.00 Product Number: F1317421
In Stock
Quantity Sold: Assembly


  • Anticipated Ship Out Time: 2-3 business days
  • Exit Location: Exit: After Rear Tire (Passenger Side)
  • Main Piping Diameter: 2.5 in. Main Pipe
  • Material: Made of Aluminized Steel
  • Notes: Includes 60 Series Delta Flow Muffler; Embossed Flowmaster logo
  • Product Fit: Direct Fit
  • Recommended Use: Performance Replacement
  • Series: Flowmaster American Thunder
  • System Type: Axle-Back
  • Warranty: Flowmaster 3-Year Limited Warranty
  • Why Buy: Aggressive Tone Chambered Muffler


Flowmaster American Thunder 17421 Aluminized Steel Exhaust System, Axle-Back type, Single Rear Exit, 2.5 in. tubing, Black finish


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