Which exhaust has the most gains?
 

I'm noticing some of them say cat back.. which I know what that is... but i'm speaking in terms of header back I guess?

Just curious... it looks like the FI exhaust gets the most gains.

All are cat back and you just get a test pipe/HFC for header back. Pretty much all test/HFC are the same.

Yes FI has the most recorded gains with Stillen a close 2nd.

For NA, its FastIntentions

yeah, that's what I really want to go with... the whole system. I can't do it right now, but hopefully soon. My Fiancee also likes the tone of the exhaust... she's into cars like me and used to have an Evo the same time I did lol.

I loved the sound of F.I. CBE, but after I added F.I. HFC I find the sound too loud now and borderline 'ricer'

It's difficult to have any type of conversation in the car now without having to shout over the exhaust.

In retrospect I think I would have just left it at the F.I. CBE and not added the HFC.

Just my 2 cents...

is there a more quiet exhaust with good gains? I certainly don't want a loud exhaust.

also... i've seen people with 18" resonators on their exhaust... doesn't that make it more quiet?

Any of the aftermarket CBE will have gains. The Berk & Stillen CBE's aren't too bad, volume wise. I have the Borla and its pretty close to stock' sound levels at idle. Once you get on it though, I would say it's a little more than twice as loud as stock. It has more of a "growl" compared to the others I've heard.

yeah, I don't want to have to yell over the exhaust like the other guy said he has to do over his FI exhaust.

Exoticspeed PWR-SI - that's what I have. Very quiet in idle/cruise, but loud when you floor it. Not many people here have it, but I love it on my car and I get nothing but good remarks on the looks and the sound.

http://www.exoticspeed.ca/product_th...pg&w=593&h=345
This is an old picture - the system now comes with X-Pipe, otherwise looks the same

No dyno figures, but it's essentially modeled off of the Amuse system so go and figure.

Looks like an invidia without the x pipe......

Dam, i dont even want to know what the ARK with Non Resonated Test Pipes is going to sound like in the cabin.

My GF is gonna hateeee it ha

Get the FI with 18" resonators and keep the cats--you will be fine

I have seen some of my customers have recommended the stock cats and the CBE with 18" resonators. This combination should be more than quiet enough for you.

Weather you are ready to make a purchase now or down the road, please do not hesitate to call me now with any questions that you may have...

Thank you, Tony

won't using the stock cats hold back the power a lot?

This is where the LTH's come in... :stirthepot:

FI LTHs + CBE is actually quieter than HFCs. :tup:

In cabin, windows up/windows down, still plenty quiet enough to enjoy music, or conversation. When you get on it, you hear what you want. Changes the tone of the exhaust to a slightly higher pitched note due to the increase in airflow. But the brute 'Volume' is actually less.

yeah... I think eventually all i'm going to do to the car is the LTH's the CBE and the drop-ins with post maf tubes.

That's exactly what I have right now. :tup:

Here are my Dyno Vids:







I used my GoProHD on the window looking inside so you can see the RPM's and use that for the audio, since I stood behind with my phone to do the rear video's, so that's why the audio goes to crap. Just the sheer power is a bit much for the mic. :stirthepot: Once I get a little more work done, I'll take some more dyno vids from a different angle. :tup:

:iagree: I went with the FI SS CBE + 18" resonators (stock cats). I think it is just about the perfect sound level wherein you can still have conversations in the cabin but it still has enough extra dBs which improves the stock Z exhaust sound (without drastically altering it) nicely. There is no rasp whatsoever, the exhaust note is very smooth.

I am on the fence about upgrading to a HFC because I want maximum performance, but am afraid of being too loud (drony).

i'm just curious as to how much power loss there is using the stock cats.

Go to the first page of the FI thread (the super long one). It has the dynos on there. In summary you get about an extra 20 hp by simply changing the exhaust. Adding hfc's will net about an extra 7.

I have Stillen CBE,Berk High flow cats...good gains..and quiet exhaust...if quiet is what u were lookin for..