Invidia N400 Exhaust Rattle - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

JBezugs · 08-04-2017, 01:11 AM

Hey everyone,

I installed my Invidia R400 just over a month ago and have been loving it so far. However, after just over a month of having it installed, I've noticed for the first time today that there is a noticeable metallic rattle coming from what sounds like the rear of the vehicle in certain conditions (under reasonably light to full heavy acceleration load, around 3200-3500 rpms and again around 4000 rpms; then on coast at similar rpms as well as 2200ish rpm).

I got under it and tightened what I could without lifting the car (tightened the midpipe to catback connection, I'll be lifting the car up tomorrow after work), but to no avail. If I played with the exhaust in the rear then start driving the noise goes away for a few minutes before starting up again.

An audio clip here, to be more specific (pay attention ~0:10 for the metallic noise):
[ame="https://www.youtube.com/watch?v=DRa-8veLKN8"]BRZ Exhaust Rattle - YouTube[/ame]

Any thoughts?

bryansuriel3 · 08-04-2017, 01:35 AM

Did you check the whole exhaust to see if it's touching something or about too?

Sent from my iPhone using Tapatalk

The Racers Line · 08-04-2017, 03:16 AM

Quote:

Originally Posted by JBezugs

Hey everyone,

I installed my Invidia R400 just over a month ago and have been loving it so far. However, after just over a month of having it installed, I've noticed for the first time today that there is a noticeable metallic rattle coming from what sounds like the rear of the vehicle in certain conditions (under reasonably light to full heavy acceleration load, around 3200-3500 rpms and again around 4000 rpms; then on coast at similar rpms as well as 2200ish rpm).

I got under it and tightened what I could without lifting the car (tightened the midpipe to catback connection, I'll be lifting the car up tomorrow after work), but to no avail. If I played with the exhaust in the rear then start driving the noise goes away for a few minutes before starting up again.

An audio clip here, to be more specific (pay attention ~0:10 for the metallic noise):

Any thoughts?

Check the hangar bracket for cracks/breaks. Already had a customer come in with a failed one.

JBezugs · 08-04-2017, 02:56 PM

Found the culprit. The weld on the hanger bracket between the rear section of the pipe and the primary hanger is weaksauce.

Not sure if there's a point warrantying it if the welds are so weak from the factory. I'll head to the muffler shop next week to fix this with a nice fat weld, as well as the other side to prevent that one from breaking as well.

For now, a temp solution to cure my annoyance:

8RZ · 08-04-2017, 03:15 PM

Lol nice temp fix.

Timmy_Jones · 08-05-2017, 01:01 PM

Good find. That will do it! I would try muffler cement or get it over to a local
Shop. Quick weld and you'll be all set. Send the bill to Invidia.

JamesssSmith · 08-07-2017, 02:10 AM

I had this as well and my diagnosis was something inside the pipe, I'll have to check my hanger brackets to see if they're broken

JBezugs · 09-07-2017, 02:01 PM

Finally went to the exhaust shop on my lunch break today to get the brackets rewelded. No issues now!

JazzleSAURUS · 09-07-2017, 02:09 PM

Quote:

Originally Posted by JBezugs

Finally went to the exhaust shop on my lunch break today to get the brackets rewelded. No issues now!

Damn he needs a 'stancenation' tramp stamp with a stance like that!

Clark20 · 11-06-2019, 09:33 PM

How much did it cost to reweld? This noise is coming from mine too

kev0 · 11-07-2019, 04:36 PM

Quote:

Originally Posted by Clark20

How much did it cost to reweld? This noise is coming from mine too

It takes about 5 minutes to weld. A shop would probably do it for free since it doesn't require much work. Otherwise, look at around $10-$30.

08-04-2017, 01:11 AM	#1
JBezugs Good Job Subaru! Join Date: Mar 2016 Drives: '24 CX-50 Meridian Location: Toronto, Ontario, Canada Posts: 355 Thanks: 146 Thanked 336 Times in 157 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Invidia N400 Exhaust Rattle Hey everyone, I installed my Invidia R400 just over a month ago and have been loving it so far. However, after just over a month of having it installed, I've noticed for the first time today that there is a noticeable metallic rattle coming from what sounds like the rear of the vehicle in certain conditions (under reasonably light to full heavy acceleration load, around 3200-3500 rpms and again around 4000 rpms; then on coast at similar rpms as well as 2200ish rpm). I got under it and tightened what I could without lifting the car (tightened the midpipe to catback connection, I'll be lifting the car up tomorrow after work), but to no avail. If I played with the exhaust in the rear then start driving the noise goes away for a few minutes before starting up again. An audio clip here, to be more specific (pay attention ~0:10 for the metallic noise): [ame="https://www.youtube.com/watch?v=DRa-8veLKN8"]BRZ Exhaust Rattle - YouTube[/ame] Any thoughts? __________________ My (no longer Green) 2017 BRZ Build Thread Last edited by JBezugs; 08-04-2017 at 10:43 AM.

08-04-2017, 02:56 PM	#4
JBezugs Good Job Subaru! Join Date: Mar 2016 Drives: '24 CX-50 Meridian Location: Toronto, Ontario, Canada Posts: 355 Thanks: 146 Thanked 336 Times in 157 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Found the culprit. The weld on the hanger bracket between the rear section of the pipe and the primary hanger is weaksauce. Not sure if there's a point warrantying it if the welds are so weak from the factory. I'll head to the muffler shop next week to fix this with a nice fat weld, as well as the other side to prevent that one from breaking as well. For now, a temp solution to cure my annoyance: __________________ My (no longer Green) 2017 BRZ Build Thread

08-07-2017, 02:10 AM	#7
JamesssSmith Member Join Date: Nov 2014 Drives: '15 BRZ Location: England Posts: 18 Thanks: 12 Thanked 14 Times in 9 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I had this as well and my diagnosis was something inside the pipe, I'll have to check my hanger brackets to see if they're broken __________________ Instagram: jimmyjimmyjimmy_

09-07-2017, 02:01 PM	#8
JBezugs Good Job Subaru! Join Date: Mar 2016 Drives: '24 CX-50 Meridian Location: Toronto, Ontario, Canada Posts: 355 Thanks: 146 Thanked 336 Times in 157 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Finally went to the exhaust shop on my lunch break today to get the brackets rewelded. No issues now! __________________ My (no longer Green) 2017 BRZ Build Thread

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08-04-2017, 01:35 AM	#2
bryansuriel3 Member Join Date: Feb 2015 Drives: Red Brz Location: Dania, FL Posts: 89 Thanks: 18 Thanked 7 Times in 7 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Did you check the whole exhaust to see if it's touching something or about too? Sent from my iPhone using Tapatalk

08-05-2017, 01:01 PM	#6
Timmy_Jones Spun Join Date: Mar 2013 Drives: 17' Focus RS Location: New England Posts: 1,179 Thanks: 396 Thanked 400 Times in 273 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Good find. That will do it! I would try muffler cement or get it over to a local Shop. Quick weld and you'll be all set. Send the bill to Invidia.

11-06-2019, 09:33 PM	#10
Clark20 Member Join Date: Sep 2019 Drives: 2019 BRZ PP Location: Colorado Posts: 64 Thanks: 10 Thanked 15 Times in 9 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	How much did it cost to reweld? This noise is coming from mine too

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