removing flex pipes! Help

corbin09 · 08-31-2011, 03:31 PM

Hello all,

I have non resonated test pipes and an Invida exhaust. Every exhaust system I have ever had has started out working well, and then after a little while the flex pipes start making more and more noise. It has gotten to the point to where I have switched out 3 Y pipes, and 3 complete exhaust systems.

My new exhaust is a true dual style so would it still really benefit from the flex pipes?

My question is what can I do to fix this?

Can I remove and weld in a pipe or something similar to flex pipe that wont make horrible noise?

Will the welds crack if I have this section replaced?

Are there any other solutions to this?

PLEASE HELP!

azn370z · 08-31-2011, 04:17 PM

I've never had problems from the flex pipe. Some cbe doesn't include the flex pipe, such as fi.

corbin09 · 08-31-2011, 04:38 PM

My question is can I get rid of the flex pipes and replace it with a pipe or resonator? Please anyone with experience let me know!!

MattP725 · 08-31-2011, 08:48 PM

You can but the point of the flex pipe is to absorb energy transfer from engine movement... if you remove them you are risking adding stress (perhaps minor stress) to the exhaust manifold. You could also crack weak points like welds...

Again this may never happen, the hangers will absorb some of the stress as well but I'd personally keep them until a problem results.

08-31-2011, 03:31 PM	#1 (permalink)
corbin09 Track Member Join Date: Jun 2009 Location: Dallas tx Posts: 665 Drives: 370z Rep Power: 279	removing flex pipes! Help Hello all, I have non resonated test pipes and an Invida exhaust. Every exhaust system I have ever had has started out working well, and then after a little while the flex pipes start making more and more noise. It has gotten to the point to where I have switched out 3 Y pipes, and 3 complete exhaust systems. My new exhaust is a true dual style so would it still really benefit from the flex pipes? My question is what can I do to fix this? Can I remove and weld in a pipe or something similar to flex pipe that wont make horrible noise? Will the welds crack if I have this section replaced? Are there any other solutions to this? PLEASE HELP!

08-31-2011, 04:17 PM	#2 (permalink)
azn370z A True Z Fanatic Join Date: Nov 2008 Location: Seattle Posts: 1,722 Drives: z34 - R1 Rep Power: 489	I've never had problems from the flex pipe. Some cbe doesn't include the flex pipe, such as fi. __________________ 2010 k23 H&R sport springs / Spc rear camber arms / SSR SP1 / Berk cbe / Varis cf lip / Nismo S-Tune side skirts

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08-31-2011, 04:38 PM	#3 (permalink)
corbin09 Track Member Join Date: Jun 2009 Location: Dallas tx Posts: 665 Drives: 370z Rep Power: 279	My question is can I get rid of the flex pipes and replace it with a pipe or resonator? Please anyone with experience let me know!!

08-31-2011, 08:48 PM	#4 (permalink)
MattP725 A True Z Fanatic Join Date: May 2011 Location: Toms River, NJ Posts: 1,904 Drives: 2010 40th Rep Power: 16	You can but the point of the flex pipe is to absorb energy transfer from engine movement... if you remove them you are risking adding stress (perhaps minor stress) to the exhaust manifold. You could also crack weak points like welds... Again this may never happen, the hangers will absorb some of the stress as well but I'd personally keep them until a problem results.