Ok…here is my 2 cents…
Out of the research I did, the Invidia Gemini was the quietest exhaust (with the exception of stock or Nizmo). I have heard the Stillen and FI intakes in person. The Stillen is only slightly louder and the FI is louder (a little deeper tone through more RPM range).
If you are interested in ONLY buying a CBE for your car and you want the most HP for your dollar…then going with Stillen/Berk/FI would probably be the best idea because the Gemini does dyno a little less than those exhaust (maybe 5-8hp). The design sacrifices a little bit of the flow to make it a little more quiet.
Here is my post -
Invidia Gemini CBE & ERZ HFC Review (with db comparison)
However, I bought the Gemini with the intention of putting it with a HFC and hoping to pair a system that would give good HP and not too loud. The FI CBE and HFC’s sound sick but it is a little too loud for my taste. Also, the Gemini is the only exhaust I know of that when paired with HFC’s doesn’t produce a hiss.
The whole “Gemini puts down less power” thing is somewhat irrelevant though when you start stacking other hardware and get tuned. My dyno numbers are pretty damn good and prove it is a great system paired with HFC’s / CAI / Cobb Tune.
Here are my numbers -
Cobb Tuned @ Altered Atmosphere – Awesome Gains!
But here is the big thing…the term “too loud” is so freekn subjective and it really comes down to personal taste. Plus…everyone is going to say there setup up is the best (like I am doing right now).
Least we can agree the 370z is the best!
LOL…I am not sure what JPIT is talking about. I bought my Gemini from him used and don’t know why he thought the system was too loud. JPIT must be super sound sensitive. I mean the car is louder at WOT with the HFC’s on but regular driving is the same as when I had just the Gemini on.
BTW dude…you live in NJ (I’m in Lanc. Pa). If you want to meet up and hear my car in person we can do that. You will be sold on the setup!!