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™ 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® 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® 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.
Specifications:
| Description_ASC |
Fits 2005-2009 Ford Mustang with V6 engine, coupes and convertible models. |
| Description_DES |
Flowmaster American Thunder Axle-back Exhaust System |
| Description_EXT |
2005-2009 Ford Mustang with V6 engine. Fits coupe and convertibles. - Moderate sound |
| Description_INV |
05-09 FORD MUSTANG V6 AMT |
| Description_FAB |
Includes Hangers and Hardware for an Easy Installation |
| Description_FAB |
Mandrel bent 16-gauge Aluminized Steel Tubing |
| Description_FAB |
Moderately Aggressive Exterior Exhaust Tone |
| Description_FAB |
Dyno Tuned for Maximum Performance |
| Description_FAB |
4.00-inch Polished Stainless Steel Tip |
| Description_FAB |
Uses the Factory Hanger Locations |
| Description_FAB |
60 Series Performance Muffler |
| Description_FAB |
Easy Installation |
| Description_MKT |
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™ 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® 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® 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. |
| Muffler Part Number |
Kit Only |
| Exit Position |
Single Rear Exit |
| Muffler Series |
60 Series Delta Flow |
| 2WD/4WD |
2WD |
| Inlet Diameter |
2.500 in. |
| Muffler Count |
1 |
| Single or Dual |
Single |
| Emission Code |
5 |
| Inlet Inside Diameter |
N/A |
| Heat Shield Attached |
No |
| Exhaust Type |
Single |
| Tubing Diameter |
2.500 in. |
| Outlet Diameter |
2.500 in. |
| California Proposition 65 Chemical Name |
Chromium (hexavalent compounds), Nickel (Metallic) |
| Exit Style |
Straight |
| Color |
Black |
| Sound Level |
Moderate |
| California Proposition 65 Chemical Name 1 |
Nickel (metallic) |
| Material |
Aluminized Steel |
| Outlet Outside Diameter |
3.500 in. |
| Title |
Flowmaster 17421 Axle-back System 409S - Single Rear Exit - American Thunder - Moderate Sound |
| California Proposition 65 Required |
Yes |
| Heat Shield |
No |
| Inlet Diameter (in) |
2.5 |
| Product Type |
Exhaust System |
| Single Dual |
Single |
| Warning |
California Proposition 65 |
| Exhaust Series |
American Thunder |
| System Type |
Axle Back |
| Tail Pipe Diameter |
2.500 in. |
| California Proposition 65 Chemical Name 2 |
Chromium (hexavalent compounds) |
| Tip Quantity |
1 |
| Tip Diameter |
3.500 in. |
| WARNING CA Proposition 65 |
Yes |
| WARNING CA Proposition 65 Message |
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
| Brand |
Flowmaster |
| Muffler Quantity |
1 |
| Outlet Diameter (in) |
2.5 |
| Tip Diameter (in) |
3.5 |
| Tubing Diameter (in) |
2.5 |
| Length |
10.0000 |
| Width |
13.0000 |
| Height |
20.0000 |
| Weight |
18.0000 |
