I'm currently running F.I. LTH w/ an unresonated TDX and I am totally in love with the sound.

^LOL

I'm on NonRes CF and its "droney" under 3k, but it sounds so good..the burbles when letting off the throttle sound so good, and then downshifts..yum...It has gotten louder after the Tune though. Less burbles, more smooth loud tone. Louder then I expected..its awesome!!!

Stock < Nismo < Stillen < HKS < Motordyne < FI (12/NR) < Meisters...