Flowmaster American Thunder Axle-Back Exhaust System 17421 for 2005-2009 Ford Mustang V6

The Flowmaster American Thunder Exhaust System, part number 17421, is an axle-back exhaust kit designed for the 2005-2009 Ford Mustang with a V6 engine. It provides a dual rear exit configuration and is built around 2.5-inch exhaust tubing.

This exhaust system is constructed from aluminized steel for functional durability and features 3.5-inch polished exhaust tips. The polished tips add a finished appearance at the rear of the vehicle while the dual-exit layout complements the Mustang’s factory styling.

Flowmaster’s American Thunder design delivers a branded exhaust-system solution for Mustang V6 applications. The kit is identified as an axle-back system, making it suitable for replacing the rear exhaust section while retaining the specified vehicle application and configuration.

Use the vehicle application details to confirm suitability before purchase. This product is listed for Ford Mustang models from 2005 through 2009 equipped with a V6 engine and includes the stated dual rear exit, aluminized-steel construction, and polished-tip design.

Features:

• Brand: Flowmaster
• Part Number: 17421
• System Type: Axle-back exhaust system
• Vehicle Application: 2005-2009 Ford Mustang with V6 engine
• Exhaust Diameter: 2.5 inches
• Exit Configuration: Dual rear exit
• Exhaust Tips: 3.5-inch polished tips
• Material: Aluminized steel
• Product Style: American Thunder