invidia gemini CBE with Megan test pips

mazmaz · 03-25-2018, 04:35 PM

Hi guys ,
I have small doubt ,when I bought my car it had megan test pips and last week I installed invidia gemini CBE .The sound now is loud and in our country its illegal .I am thinking to change the HFC to AAM or invidia HFC will that help to reduse the loudness ?? i need the power gains with out loud sound

ClemsonVQdude · 03-25-2018, 07:13 PM

In my experience the sound difference between test pipes and high flow cats is not a huge difference, test pipes are a little louder. Are the test pipes resonated? And is there a resonator in your midpipe? Probably is but if not you can get a resonator welded in and it will reduce the sound a little bit but not much.

mazmaz · 03-26-2018, 12:39 AM

Quote:

Originally Posted by ClemsonVQdude

In my experience the sound difference between test pipes and high flow cats is not a huge difference, test pipes are a little louder. Are the test pipes resonated? And is there a resonator in your midpipe? Probably is but if not you can get a resonator welded in and it will reduce the sound a little bit but not much.

Hey,
I guess the filter is removed from my test pips... And yes there is a mid pip I got the full kit from invidia

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stricha · 03-26-2018, 11:19 AM

What filter? There's no filter on those. I have no idea what you are referring to. That, and what are you asking us? Power gains without loud sound? What can make is quieter? What are you asking?

mazmaz · 03-26-2018, 11:35 AM

Quote:

Originally Posted by stricha

What filter? There's no filter on those. I have no idea what you are referring to. That, and what are you asking us? Power gains without loud sound? What can make is quieter? What are you asking?

HI,

What I mean by filter inside the megan hfc like in the photo. An am not into a loud sound all what I need is to increase the hp thats why I replaced my CBE. So my question here how to reduce the loudness of my CBE

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370zBLAST · 03-28-2018, 07:54 PM

Quote:

Originally Posted by mazmaz

HI,

What I mean by filter inside the megan hfc like in the photo. An am not into a loud sound all what I need is to increase the hp thats why I replaced my CBE. So my question here how to reduce the loudness of my CBE

Sent from my E6833 using Tapatalk

You will need either HFC (hp increase over stock cats) or resonated test pipe (hp gains over HFC) youre gonna be lounder over stock no matter what aftermarket exhaust u go with.

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Quicksilvers · 03-29-2018, 12:46 AM

Out of all the HFC’s you listed I would opted for the AAM HFC’s. No matter what aftermarket exhaust you install it will be louder the only exhaust that will probably be only a little louder than the stock exhaust would be the Nismo exhaust. If you are looking to drastically tone down your 370Z you will have to install aftermarket HFC’s or the stock Nissan catalytic converters. Test pipes resonated or not will be quite louder. In your country what db sound from your exhaust is considered to be legal?

03-25-2018, 04:35 PM	#1 (permalink)
mazmaz Base Member Join Date: Apr 2017 Location: oman Posts: 3 Drives: 14 nissan 370z bk m6 Rep Power: 8	invidia gemini CBE with Megan test pips Hi guys , I have small doubt ,when I bought my car it had megan test pips and last week I installed invidia gemini CBE .The sound now is loud and in our country its illegal .I am thinking to change the HFC to AAM or invidia HFC will that help to reduse the loudness ?? i need the power gains with out loud sound

03-26-2018, 11:19 AM	#4 (permalink)
stricha Base Member Join Date: Oct 2017 Location: Baltimore Posts: 75 Drives: 20xx z Rep Power: 8	What filter? There's no filter on those. I have no idea what you are referring to. That, and what are you asking us? Power gains without loud sound? What can make is quieter? What are you asking? __________________ A car is only as good as it's driver

03-29-2018, 12:46 AM	#7 (permalink)
Quicksilvers A True Z Fanatic Join Date: May 2017 Location: Atlanta, GA Posts: 2,039 Drives: 2017 370z Rep Power: 25463	Out of all the HFC’s you listed I would opted for the AAM HFC’s. No matter what aftermarket exhaust you install it will be louder the only exhaust that will probably be only a little louder than the stock exhaust would be the Nismo exhaust. If you are looking to drastically tone down your 370Z you will have to install aftermarket HFC’s or the stock Nissan catalytic converters. Test pipes resonated or not will be quite louder. In your country what db sound from your exhaust is considered to be legal? Last edited by Quicksilvers; 03-29-2018 at 12:49 AM.

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03-25-2018, 07:13 PM	#2 (permalink)
ClemsonVQdude Base Member Join Date: Dec 2017 Location: Anderson SC Posts: 52 Drives: 2013 Nissan 370z Rep Power: 8	In my experience the sound difference between test pipes and high flow cats is not a huge difference, test pipes are a little louder. Are the test pipes resonated? And is there a resonator in your midpipe? Probably is but if not you can get a resonator welded in and it will reduce the sound a little bit but not much.