[Tigers] exhaust follow up

[Thomas Witt]

I have a Flowmaster 50 series on my 318 Valiant. Even though the 3 chamber, 
50 series is suppose to be quieter (than the 40's) I still get a horrible 
resonance from about 1,900 RPM to exactly 2,600 RPM, then it drops right 
off.
 While it probably doesn't help that I'm running a single muffler with 3" 
pipe I still hate the noise being right in the typical driving band.
Others may have different experiences as there are a lot of factors that 
result in the final sound one hears.
Tom