Jun bl downpipes sound under load

So I just got my downpipes with stock mufflers still on installed. It sounds great so far pretty much exactly what I wanted. One issue I’ve noticed at high load around 2200-2400 I get a resonance sound/almost metal vibration sound. Anyone else have this? No rattles or sounds any other time. Everything fit perfect and is solid as a rock.

 

I went by the shop and put the car up and every thing is solid and the fit looks perfect. Maybe it’s just a resonance in the exhaust. As for sound it just sounds a little louder and deeper then stock. I’ll do some videos as soon as I can.

 

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I have stock exhaust just the downpipes. What does yours sound like? To me it sounds like metal vibrating to the sound in the pipes but not like there’s something loose.
You can definitely tell this car makes some drown/resenace at that rpm prob like 2300-2600 rpm. I have to be giving it enough has to make
Boost come on to make the sound any other time it does not make it.

 

Here is a video of me making it do it. It’s hard to hear it here but I can hear the sound slightly in the video.

 

I noticed it happens when the turbos spools as well. Maybe it’s just making the exhaust sound raspy after the waste gate opens. It only does it in that rpm though. I can floor is after 2500 rpm and after turbos spool I do not hear it.

 

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I did a lot of reading and it seems like it’s just rasp. Lots of bmw and Nissan’s with v6 get this as well. Not much I can do about it I guess. Day to day driving I don’t think I’ll hear it. I never load it up fully at 2000rpm. I don’t really hear it in 1st or second because I pass that rpm to quick it’s mostly 3-4 gear at 2300-2500. I wonder if I wrapped my downpipes if it would cover it up enough. I read of guys doing this.

 

None other then that sound I hear.

 

Sounds great lower tone and a little louder.

 

I wonder if it’s wastegate rattle as well....

 

I took it to another good muffler shop that I’ve gone to lots and they had a look as well and could
Find no leaks or rattles/fitment problems. Here is another video that shows the sound better. I noticed it doesn’t the sound more when the cars cold. Also can here the sound for a split second when I shift from 1-2 at redline. Anymore ideas from you guys? I like the sound of the downpipes but this sound makes the car sound cheap when it does it.

 

Hey I’m just wondering what the sound you hear sounds like?

 

Here is a launch let me know what you think.