y-pipe and exhaust flutter
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5th Wheeling
Joined: Mar 2004
Posts: 41
Likes: 1
From: Selma, TX
y-pipe and exhaust flutter
I just had y-pipe changed and am now experiencing the dreaded exhaust flutter. I have 2004 v-10 with Magnaflow cat-back exhaust. I enjoy the added performance but the flutter sounds like crap. I eventually was going to go with headers but am now rethinking strategy. Has everyone that has changed y-pipes experienced the exhaust flutter or do different y-pipe conversions make a difference? Will headers make it worse? Thanks for any input!
Sit. Stay.
Joined: Oct 2001
Posts: 18,308
Likes: 20
From: Washington State
Yeah, I have flutter but only at certain RPM and throttle settings. I can't really hear it unless the windows are down and I'm next to something that will reflect the sound back to me. I like the added mid/high rpm punch I have now. Most of the time the Banks drowns out the flutter anyway. 
Last edited by Monsta; Apr 14, 2007 at 02:12 PM.
Elder User
Joined: May 2003
Posts: 858
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duetsch65, Same thing here after my Y-pipe mod. 1900-2200 on hard accleration will do it every time. Roll on the gas lightly and no noise. From what i can gather from others here with headers, they make no flutter noise.
Elder User
Joined: May 2003
Posts: 858
Likes: 1
Originally Posted by Monsta
Actually NoMo has said many times that the addition of his Banks power pack (new headers and Y-pipe) produced the "flutter" as well as raised the entire sound of the exhaust in the cab.
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Sit. Stay.
Joined: Oct 2001
Posts: 18,308
Likes: 20
From: Washington State
Hmmmm is right. Oh well... Guess we'll wait for Krewat's report on flutter. 
Oh wait...I think he's using the stock Y-pipe.
Oh wait...I think he's using the stock Y-pipe.
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FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
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From: Long Island USA
I'll be using the stock y-pipe after the headers as a test-bed.
When I do modify the y-pipe, the stock will be measured, and I'm going to try to keep the length the same on both sides of the "Y" - which is quite a feat.
I think the "flutter" is because of the y-pipe being unequal length, or too short or too long of a run before the merge.
When I do modify the y-pipe, the stock will be measured, and I'm going to try to keep the length the same on both sides of the "Y" - which is quite a feat.
I think the "flutter" is because of the y-pipe being unequal length, or too short or too long of a run before the merge.
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
You know, I also get a drone at 1700-2000RPM under a very light load.
Is that "flutter"?
After being here for 6 years, I still have no idea really what the exhaust "flutter" is...
I might enjoy it
Is that "flutter"?
After being here for 6 years, I still have no idea really what the exhaust "flutter" is...
I might enjoy it
Junior User
Joined: Mar 2004
Posts: 65
Likes: 0
From: Delaware
What about the folks with the e-bay Y pipe do you get the flutter also?
Like asked above for us 2 valvers is there a power gain?
I was ready get these done but now ya got me second guessing again? Agh!!
Like asked above for us 2 valvers is there a power gain?
I was ready get these done but now ya got me second guessing again? Agh!!