FATHER'S DAY DISCOUNT

DAD2025

Flowmaster 17421 - Axle-back System 409S - Single Rear Exit - American Thunder - Moderate Sound

Flowmaster  |  MPN: 17421  |  SKU: FLO-17421
$37695 $47295

PLEASE NOTE: Pictures may be repsentative of style, rather than the actual product. Read the description for more details.

Description

Flowmaster 17421 - Axle-back System 409S - Single Rear Exit - American Thunder - Moderate Sound

Exhaust System - American Thunder - Axle-Back - 2.5 in Diameter - Dual Rear Exit - 3.5 in Polished Tips - Steel - Aluminized - Ford V6 - Ford Mustang 2005-09 - Kit

American Thunder Axle Back Exhaust System; Single; Single Side Exit; 2.5 in. Outlet; 5x10 in. Muffler Assembly; 3.5 in. Rolled Edge Stainless Tip;

This American Thunder axle-back exhaust system is constructed from 16-gauge mandrel-bent aluminized steel and includes a pair of specially designed 60 Series(TM) performance muffler with the sound that goes hand in hand with the performance image of the Mustang. The muffler is finished off with large 4.00-inch polished stainless steel tips to fill out the exhaust cutouts in the rear valance for a muscular appearance that matches the sound. As an American Thunder(R) system, it delivers a moderate interior tone and exterior sound that is suited to the enthusiast who wants their performance to be heard. Like all Flowmaster(R) exhaust systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, the system includes all necessary parts and hardware for easy installation. Note: Fits both coupes and convertibles.

  • Mandrel Bent 16ga Aluminized Tubing
  • Moderate Exterior Exhaust Tone
  • Mild Exterior Exhaust Tone
  • Incl. Hangers and Hardware For Easy Installation
  • Connects After Factory Catalytic Converter
  • Dual Out Rear Exit
  • Dyno Tuned for Maximum Performance
  • Premium Flowmaster Quality
Exhaust Type: Single
Exit Position: Single Rear
Exit Style: Straight
Heat Shield Attached: No
Inlet Diameter: 2.500 in.
Inlet Inside Diameter: N/A
Material: Aluminized Steel
Muffler Count: 1
Muffler Part Number: Kit Only
Muffler Series: 60 Series Delta Flow
Outlet Diameter: 2.500 in.
Outlet Outside Diameter: 3.500 in.
Single or Dual: Single
Sound Level: Moderate
System Type: Axle Back
Tail Pipe Diameter: 2.500 in.
Tip Diameter: 3.500 in.
Tip Quantity: 1
Tubing Diameter: 2.500 in.
Color: Black
Exhaust Series: American Thunder

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Venmo
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.


What are people saying about CSP?