• The Flowmaster 40 Series Delta Flow Muffler boasts famous Flowmaster power and torque with a milder tone and reduced interior resonance
• The ideal muffler for late-model performance cars and dual-exhaust cruisers
• Quality Flowmaster muffler crafting uses aluminized steel for corrosion resistance and precise mig welds for maximum durability
• The Flowmaster 40 Series Delta Flow Muffler utilizes Delta Flow deflector technology for noise reduction and superior exhaust scavenging
• Original two-chamber design maximizes horsepower and torque
• Casing embossed with the Flowmaster name
• Your Flowmaster 40 Series Delta Flow Muffler carries a 3-year warranty

All the power and performance of Flowmaster's muscular mufflers without the roaring interior resonance—that's the idea behind their 40 Series Delta Flow Muffler. It's the ideal pick for late-model performance cars that want powerful exterior tone while enjoying a quieter ride.

At the heart of the 2-chamber design is Flowmaster's exclusive Delta Flow technology. This innovative engineering utilizes precision-placed deflectors that not only mute interior sound, they fuel increased exhaust scavenging for the most possible power.

Also ideal for dual exhaust cruisers, the Flowmaster 40 Series Delta Flow Muffler boasts the quality construction you'd expect from Flowmaster. Each Flowmaster Muffler is built with 16-gauge aluminized steel for corrosion resistance and fully mig-welded for maximum durability. Best yet, your Flowmaster 40 Series Delta Flow Muffler boasts a 3-year warranty.

Flowmaster 40 Series Delta Flow Mufflers come in a variety of inlet/outlet configurations and sizes, shown above. Select the inlet/outlet diameter you need from the drop down at right.

Select 40 Series Delta Flow model configurations are available with T-409 stainless steel construction instead of aluminized steel for extending protection against corrosion and yellowing.

Featured Product

40 Series Delta Flow Standard Muffler All the power and performance of Flowmaster's muscular mufflers without the roaring interior resonance—that's the idea behind their 40 Series Delta Flow Muffler. It's the ideal pick for late-model performance cars that want powerful exterior tone while enjoying a quieter ride. At the heart of the 2 From: $90.03