I jsut installed megan resonated test pipes and a pro-1 y pipe. I am getting alot of noise from under the car not only from the rear like a whisp noise on decel and jsut alot of noise is this normal?

could it be hitting anything should i have someone weld the stock bracket on if its normal ill live with it if not please help!

 

Describe the noise. If its a sort of ticking noise when you push the gas, its an exhaust leak.

 

test pipes are raspy anyways, so you should be getting a lot of noise...but like FairladyZ said, describe the noise better

 

If it is clunking noise then either the test pipe is hitting the body or the test pipe to y-pipe flange is hitting the frame.

You will get more noise in general now towards the front of the babin since the test pipes are right under your feet.

 

its like a snake slither noise hahaha i cant think of a good way to decribe it and inside the car its lieka vibrating noise mostlyy on the decel thanks guys

 

if its a constant "psst" sound coming from under the car, then it sounds like you have an exhaust leak. Just tighten down the bolts or insert some extra gasket material as well

 

its not constant jsut when revving and decel

 

I've got the same sound. Others are experiencing the same noise. There was another thread about it a while back.

It's a hissing sound that is random and minimal at idle but is very noticeable when you pull your foot off the throttle. It sounds sort of like a blow off valve. I also notice the sound when I'm coasting down steep roads (in gear).

I first noticed this sound after I installed my test pipes but it got louder after my Y-pipe was installed.

I've had it checked out by my installers but they weren't able to find a leak.

As an experiment, I applied some exhaust sealant (comes in a tube @ Pep Boys) at all the relevant flanges but the noise persists.

I can live with the sound but I'm concerned that I may be losing some power.

 

ok now there is another noise sounds like a rattle snake behind the seats i have a pro-1 y pipe merginge into stock exhaust is that the noise from the turbulant air or is it vibrating or is that rasp sounds like a rattle/vibration

 

I have the same noise. There are no leaks in my exhaust system (the guys that heard my car at Ricky and Ronnie's Know). Anyways, I made brackets in hopes of it going away. Let's just say I learned to live with the sound

 

you have the same rattling noise i have or the air leak noise?

 

yeah i have the snake rattle also... also the whisp as i accel... i take the whisp as a turbo spool... i like that sound but at times the snake rattle is kinda annoying...

 

has nothing to do with the y-pipe!!!!!! It's ur testpipes

 

so theres no leak nor a fix for it so basically its just rasp and live with it?

 

yes! live with it or ditch the TP like I did.. TP aren't for people who are super picky.. If you can handle the noise for some easy HP then more power to ya

 

my test pipesmake that slithering type noise on deceleration at appx. 1900-2300 rpm's....will resonators welded inline on the test pipes make it go away?

 

i guess ill wait till i get my fuji axle back im just making sure there wasnt anything out of the ordinary and other people experince this

 

FYI - https://my350z.com/forum/showthread....5&page=1&pp=20

 

i have the same noise, and i have crawford cats

 

maybe if i get resontors welded into my y-pipe it will help?