Flowmaster American Thunder Single Exhaust System - 2005-10 Ford Mustang GT/GT500/California Special/Convertible 4.6L/5.4L R030015S This heat treatment method produces

This heat treatment method produces a deep case that enhances strength while creating an extremely hard load bearing wear surface

The distributor caps are stress-relieved immediately after molding to ensure dimensional stability

3 AN Straight Outlet

Ground Clearance Indicator

Take Up Spring

Flowmaster American Thunder Single Exhaust System - 2005-10 Ford Mustang GT/GT500/California Special/Convertible 4.6L/5.4L R030015S This heat treatment method producesThis 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 America 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