Originally Posted by Minicobra1

I have the hiss on the decel (after HFC install) and the rasp, but the rasp tends to go away the warmer the car gets, after 200 on the oil gauge, it's barely there, a little bit more on WOT, but not bad. It's terrible when the car is first warming up in the morning.

I also noticed this vibration right around 1800-2000 rpm, it goes away past that. when idling if I rev the engine slowly, as it's climbing and get to the 1800rpm mark I get the vibration. It's pretty noticeable when cold, and not as much when warm, but still there. I'll post a video on that later, anyone else have this vibration?? I noticed slightly before the HFC install, but way worse after. I have the Berks & the Nismo CBE.