Flowmaster Series 40 Muffler. The original 40 Series muffler delivers an aggressive exterior and interior tone. If you are looking for the original Flowmaster Sound" this muffler is for you. Constructed of 16-gauge aluminized steel and fully MIG-Welded For maximum durability. Muffler features 2-1/4" IN (offset)/ 2-1/4" OUT (center).

Features and Benefits

• Aggressive and Powerful Exterior Exhaust Tone
• Notable Interior Resonance
• Excellent For Street/Strip and Off-Road Applications
• No Internal Packing to Blowout

Flowmaster Series 40 mufflers are designed for use on street and strip vehicles. They take the sound waves produced in the exhaust and cancel them against angled baffles built into the muffler case. This improves both horsepower and fuel economy. Best of all, these mufflers allow you to hear that cool Flowmaster tone inside of the vehicle, as well as outside of it. So, if you want more power and less noise, then you need a Flowmaster muffler.