Flowmaster American Thunder Exhaust Systems
This aggressive sounding system is designed to replace the original rear mounted mufflers located behind the rear axle. With easy fit in mind, the system is mandrel bent for maximum performance and includes specially selected mufflers to support the performance image of the car. As an American Thunder system, it delivers an aggressive exterior tone with moderate interior sound level that is suited to the enthusiast who wants their performance to be heard. Like all Flowmaster 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.
• Dyno tuned for maximum performance
• Aggressive sound exterior exhaust tone
• Includes hangers and hardware for easy installation
• Mandrel bent 16 gauge tubing
Part Type: Exhaust System
Application: '05-'09 Ford Mustang V6 (Including Convertibles)
System Series: American Thunder
System Type: Axle Back - Single
Tone Level: Moderate
Inlet Diameter: 2.50"
Outlet Diameter: 2.50"
Tubing Diameter: 2.50"
Muffler Series: 60 Series Delta Flow
Muffler Quantity: 1
Heatshield: No
H-Pipe: No
Hardware Included: No
Exit Position: Single Rear Exit
Tip(s) Included: Yes
Tip Diameter: 3.50"
Tip Material: Stainless Steel
Material: 16 Gauge Aluminized Steel
Finish: Aluminized
Manufacturer: Flowmaster
Manufacturer's Part Number: 17421
Weight: 22.0 lbs.
Warranty: Limited 3-Year
Quantity: Sold as Kit
Installation Instructions (PDF): click here | 
