The Flowmaster website states that, "Delta Flow® technology provides superior scavenging of exhaust gases even over a comparable (standard) Flowmaster muffler. This results in increased horsepower, torque and fuel economy".Dead Link Removed
But DeltaFlow also reduces both interior and exterior resonance...the DeltaFlow has increased torque and HP than the standard, non-Delta muffler,which has a more powerful int. & ext. sound. My question is, how much quieter is the DeltaFlow? Would it be worth sacrificing the sound of 40's for slightly more performance from the Deltas? Is it just a DeltaFlop? I want my cake, AND to eat it, too! Feed back appreciated. :exporange