pipe between muffler and resonator looks strange - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

ghostzfh · 07-08-2021, 12:13 PM

The pipe between my muffler and resonator seems rusted on my 2016 FRS, but neither the muffler or the resonator seems to be rusting. This is strange considering that all three are connected, and that somehow the pipe in between these two things became selectively rusted.

Is this normal or is this a cause for concern? And if it's an issue, what caused it and what could I do about this?

NoHaveMSG · 07-08-2021, 01:16 PM

Likely different grade of stainless made from a different vender for Subie with possibly different post treatment process. Nothing to be concerned about, it will last another 20 years.

fminicooper · 07-08-2021, 01:31 PM

Mine was all rusty as well.
Painted with black HT paint when I took apart for front pipe change.

NoHaveMSG · 07-08-2021, 01:46 PM

I just double checked, the stock rear muffler is aluminized mild steel. That is why the flange is so rusty at the joint. The mid pipe is going to pick up corrosion from heat cycling with debris stuck to it, and galvanic corrosion from being in contact with the muffler section.

Yoshoobaroo · 07-08-2021, 02:08 PM

Quote:

Originally Posted by NoHaveMSG

galvanic corrosion

*Something* always rusts

NoHaveMSG · 07-08-2021, 02:17 PM

Quote:

Originally Posted by Yoshoobaroo

*Something* always rusts

And stainless will corrode sooner if it is in contact with a ferrous metal(galvanic corrosion).

Joveen · 07-08-2021, 02:39 PM

Megan Racing has a replacement or you can get the remark one.

Sent from my SM-G998U using Tapatalk

Yoshoobaroo · 07-08-2021, 03:31 PM

Quote:

Originally Posted by Joveen

Megan Racing has a replacement or you can get the remark one.

Sent from my SM-G998U using Tapatalk

Oooor you can wait until there’s a hole in it.

Ultramaroon · 07-08-2021, 05:03 PM

Quote:

Originally Posted by NoHaveMSG

And stainless will corrode sooner if it is in contact with a ferrous metal(galvanic corrosion).

galvanize this

NoHaveMSG · 07-08-2021, 07:02 PM

Quote:

Originally Posted by Ultramaroon

galvanize this

Just don't attach yourself to any dissimilar materials and you will be fine.

Ultramaroon · 07-08-2021, 07:10 PM

Quote:

Originally Posted by NoHaveMSG

Just don't attach yourself to any dissimilar materials and you will be fine.

lol...

you totally win

Yoshoobaroo · 07-08-2021, 07:21 PM

Ultramaroon · 07-08-2021, 07:35 PM

Quote:

Originally Posted by Yoshoobaroo

.

10/10 many layers

soundman98 · 07-08-2021, 10:50 PM

i think you need to spend more time driving your car and less time laying underneath it!

07-08-2021, 12:13 PM	#1
ghostzfh Member Join Date: May 2016 Drives: 2016 Scion FRS Halo Location: Mid-Atlantic Posts: 77 Thanks: 42 Thanked 25 Times in 20 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	pipe between muffler and resonator looks strange The pipe between my muffler and resonator seems rusted on my 2016 FRS, but neither the muffler or the resonator seems to be rusting. This is strange considering that all three are connected, and that somehow the pipe in between these two things became selectively rusted. Is this normal or is this a cause for concern? And if it's an issue, what caused it and what could I do about this? Attached Images

07-08-2021, 10:50 PM	#14
soundman98 ProCrastinationConsultant Join Date: Sep 2013 Drives: '14 Ranger, '18 Tacoma 4Dr LB Location: chicago-ish Posts: 11,315 Thanks: 35,124 Thanked 13,637 Times in 6,772 Posts Mentioned: 98 Post(s) Tagged: 0 Thread(s)	i think you need to spend more time driving your car and less time laying underneath it! __________________ "The time you enjoy wasting is not wasted time"

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07-08-2021, 01:31 PM	#3
fminicooper Senior Member Join Date: Dec 2017 Drives: FRS Hot Lava Location: Houston Posts: 111 Thanks: 81 Thanked 51 Times in 34 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Mine was all rusty as well. Painted with black HT paint when I took apart for front pipe change.

07-08-2021, 02:39 PM	#7
Joveen Senior Member Join Date: Mar 2018 Drives: Bone stock Location: Windsor, CT Posts: 764 Thanks: 534 Thanked 232 Times in 162 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	Megan Racing has a replacement or you can get the remark one. Sent from my SM-G998U using Tapatalk

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