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Which exhaust has the most gains?

Originally Posted by Methodical4u won't using the stock cats hold back the power a lot? This is where the LTH's come in... FI LTHs + CBE is actually quieter than

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Old 06-16-2011, 05:50 PM   #16 (permalink)
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Originally Posted by Methodical4u View Post
won't using the stock cats hold back the power a lot?
This is where the LTH's come in...

FI LTHs + CBE is actually quieter than HFCs.

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.
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Old 06-16-2011, 05:55 PM   #17 (permalink)
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Originally Posted by XwChriswX View Post
This is where the LTH's come in...

FI LTHs + CBE is actually quieter than HFCs.

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.
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Old 06-16-2011, 05:56 PM   #18 (permalink)
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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.
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Old 06-16-2011, 06:02 PM   #19 (permalink)
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Here are my Dyno Vids:

http://www.youtube.com/watch?v=JFKyGc-JRUo

http://www.youtube.com/watch?v=-AiWDqmwpVA

http://www.youtube.com/watch?v=XVJgTem5Ppc

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. Once I get a little more work done, I'll take some more dyno vids from a different angle.
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Old 06-16-2011, 06:02 PM   #20 (permalink)
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Originally Posted by tjlazer View Post
Get the FI with 18" resonators and keep the cats--you will be fine
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).
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Old 06-16-2011, 07:29 PM   #21 (permalink)
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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.
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Old 06-16-2011, 07:58 PM   #22 (permalink)
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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.
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Old 06-16-2011, 08:20 PM   #23 (permalink)
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I have Stillen CBE,Berk High flow cats...good gains..and quiet exhaust...if quiet is what u were lookin for..
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