Flowmaster 40 Series Original Chambered Muffler – 2.50 in Inlet / 2.50 in Center Out – Aggressive Sound

Meet the Flowmaster 40 Series Original Chambered Muffler, a cornerstone of the Flowmaster heritage renowned for its bold bark and unmistakable street presence. Built to endure heat and vibration, this 16-gauge aluminized steel muffler arrives fully MIG-welded with no internal packing to wear out. The design features a 2.50 in offset inlet paired with a 2.50 in center-outlet, making it a flexible addition to many custom exhaust layouts while preserving strong exhaust flow.

Legendary sound and two-chamber design

• Bold, aggressive bark that defines an iconic Flowmaster character
• Two-chamber internal layout shapes a deep, confident exhaust tone
• Signature cadence that helps your vehicle stand out on both street and strip

Performance and durability

• Enhanced airflow and reduced back pressure to support throttle response and engine feel
• 16-gauge aluminized steel with MIG welds for heat resistance and durability
• No internal packing to wear down, helping sustain performance over time

Flexible, universal fitment

• Designed for custom and modified exhaust systems with multiple inlet/outlet options
• Center and offset configurations simplify installation and help you achieve a balanced fit

In real-world use, the Flowmaster 40 Series can complement a range of builds—from bold street machines to rugged trucks—providing a commanding presence without sacrificing driveability. If you want a recognizable exhaust personality, this muffler offers a pathway to that character with a reliable, durable build. Benefits are possibilities you may experience with proper setup and tuning.