Exhaust Manifold Questions for 01GT

[2001GTPEWTER]

Its not so much horsepower I need (the car is fast enough in a town with 25mph speed limits) what I wanted was to enhance the sound of the flowmaster a little. I like the tone but I've heard anniversary edition Mustangs role past me near my house with exhaust set-ups that just seem to sound a little deeper and louder than mine. Again, I've never heard my car accelerate with me anywhere but the driver's seat. Sometimes the interior resonance can drown out the sound coming from the end of the tail pipes.