I have a G37X Sedan with the Stillen Cat Back Exhaust and want to get some HFC. Anyone know what would sound good with the Stillen Exhaust? I want it to be louder (not crazy loud) but to have as little rasp as possible.

 

When I had my Stillen setup, I ran it with the Stillen HFC which are non resonated which ended up introducing a little rasp.

If you are not wanting any rasp, I would recommend Fast Intentions resonated HFC.

G Sedan Resonated High Flow Cats, Fast Intentions

 

Thanks! I was also thinking about the Berk HFC I will most likely either go with Fast Intentions or Berks.

 

I have the same setup currently and am about to install the OBX resonated Test pipes. I got them when they were super cheap. Not sure if you can still find them on eBay.

Long story short, @blnewt wrote an excellent review of them - worth checking out. He mentioned at little rasp initially at startup but that disappears after some driving.

Anywho, I'm installing them in Spring after my air ride so I'll post my review then too.

 

FI RHFC is the only one I'm aware of with a resonator and the only one I'd recommend if you want little to no rasp. If that's what you're looking for pay the extra on these or do what I did and keep an eye on the classifieds if you don't want to pay full retail.