Just installed FI Resonated HFC. PERFECT! No RASP..HISS or DRONE. I have Gemini CB, so it's pretty tame and this HFC woke it up. DEEP mellow commanding sound on acceleration, but not over the top. I can drive through the underground parking without setting off alarms and making a lot of noise.
It makes itself *known* only on acceleration, which is a good thing. At idle or cruise it's in stealth mode. Love it.
Fitment is perfect and it weighs about 5lbs less per Cat...a tad heavier than regular HFCs, since it has resonator. Well worth the $600. My take..if you're going to have this for many years to come, what's $250 more for a resonated (read: SUPERIOR SOUND QUALITY) HFC of very high quality? Also, for those wanting to avoid exhaust smell and also have a very good chance at passing both OBD (no CELS) and the SNIFFER (300 cell metallic), this a viable alternative to many other HFCs and resonated TPs out there.

I didn't take pics, but this is exactly what I have:

FIHFC VS STOCK

 

Looks like quality workmanship. I did not know that a catalytic converter even needed a resonator.

 

I love mine, congrats on the pickup

 

These wouldn't be too much louder than regular HFCs would they? I have AAM HFCs right now and I'm tired of the rasp and popping.

 

Actually they're QUIETER/MELLOWER than regular HFCs! I bet if you put these on your set up, you'd get rid of the rasp and popping.

 

See the post I just replied to...some people still find HFCs too loud/raspy.
Just like resonated TPs...only with HFCs.

 

Damnit. Now I'm going to spend another $600 that I shouldn't spend.

 

Damn OP, you really like to make Cat threads

 

Call me the *CAT MAN* from now on..

I became obsessed recently once I decided I was gonna get me an HFC or ART TP set up. Drove me nuts until I asked myself WTF do I really want here?
I'm now at peace with myself

 

You won't regret it. Why be miserable just because you made a mistake and regret spending $$ ? That's how I look at it..ya can't put the Genie back in the bottle..so just move on and be happy.