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Discussion Starter · #1 ·
Hallo I have a Nissan GTR 2020
This week I got a y-pipe from a Nissan dealership during the yearly maintenance
now car sounds better.

noticedwhen I accelerate from 100 to 180kmh the car makes a whine noise.

is this normal with a y-pipe?
 

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Discussion Starter · #3 ·
At the dealership it was a normal maintenance( oil change) + ypipe. The noise/whine don’t know how to describe. It sounds like high pitch spinning sound. Only happens when accelerating at high speed
 

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Not normal..A recording of the "whine" may help with iding the nosie..FWIW no whine on my 2020..I have the "Nissan NISMO" midpipe also....
 

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Discussion Starter · #5 ·
Just tested it .
It happens when full throttle acceleration between 3-4K rpm at 40 km/h or 100kmh. Sound comes from the rear. It’s either a whistle or metal grinding noise
 

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sounds for me like a broken gasket or they forget tighten the screws.

use smoke in this area and check if it’s leaking
 
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Most likely rubbing on the under tray and resonating at that rpm.
 

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Oddly enough, I had the same issue, but with an AAM midpipe... I tried so hard to figure out what was making the noise, it started immediately when I got my midpipe installed but it just didn't make any sense, didn't sound exhaust related. I just had a different midpipe installed and it immediately and totally went away... same sound you describe. I'm not sure if it was incorrectly installed, didn't have a reducer, was hitting the under panel somehow... but it was a binary on/off for the sound before after the midpipe switch.
 

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If you have a 90mm Y-pipe mating with a 76mm factory exhaust there is not much surface area for the gasket to seal and a lot of leaks appear here. The reducer gives a better gas flow with the flare instead of the "step" which would be the case without it.
 

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I have the AAM mid-pipe coming, they said their gaskets are designed to mate the two different diameters. Just like the ETS gasket.

Hoping I do not have this noise issue.
 

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Discussion Starter · #15 ·
So I was at the dealership they don’t have a reducer.
We put in the oem y-pipe. Now the whistle noise is gone.

i will look for other y-pipes. Probably HKS

thx everyone for the support
 

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If you want I can send you my reducer that I no longer need. I used it without a problem before purchasing a 90mm catback. You`ll have to use a 90mm gasket on one side and you can use the factory 76mm on the other side.
 

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Discussion Starter · #19 ·
If you want I can send you my reducer that I no longer need. I used it without a problem before purchasing a 90mm catback. You`ll have to use a 90mm gasket on one side and you can use the factory 76mm on the other side.
Dealership (Nissan HPC) is to far away (130km). I only go there for yearly maintanance.
Also its not guaranteed it will work with the reducer.
Thanks for the offer

Which y-pipe are you using?
Do you have downpipes?

dont wanna change to much at the car.
Stock it sounds like a vacuum cleaner
 

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Dealership (Nissan HPC) is to far away (130km). I only go there for yearly maintanance.
Also its not guaranteed it will work with the reducer.
Thanks for the offer

Which y-pipe are you using?
Do you have downpipes?

dont wanna change to much at the car.
Stock it sounds like a vacuum cleaner
Yeah okay.
I currently use an SBD 90mm resonated Y-pipe, it`s been on the car for maybe 8 years, no complaints. Catback is a Meisterschaft 90mm straight through no silencers.

I did purchase downpipes along with the Y-pipe but have not installed them they are still lying in the garage:confused:

I decided to use the factory downpipes to pass emissions testing every year.

The Y-pipe and catback are very easy to install yourself if you have access to a lift of some sort. You should not have to use a specialist to install a Y-pipe, it`s so simple.

I bought all of my stuff from the USA the choice is very good compared to what is available here in Sweden. DP`s and Y-pipe were new the catback was used
 
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