So I installed Megan Resonated test pipes over the weekend. I also have the Borla TD exhaust. My car sounds great and has noticable gains in mid range. The only nagitive is a "hiss" sound when I let of the gas. I took it to a muffler shop to check for exhaust leaks and none were found. They said the sound is coming from the exhaust passing through and past the H pipe. Is this the "rasp" people get with test pipes?

 

the "hiss" sound is coming from your tires

 

Funny, but no it is not my tires.

 

You must have a snake in your car.

 

ive heard replacing the h pipe with an x can somewhat solve this, but not sure...

 

damn, u beat me to it Legacy

 

I have the same setup, but with the magnaflow xpipe. It happens around 2200rpm. It sounds horrible. And the cause is the Megan racing TPs. Im taking mine off.

 

do you have a resonator on there? I know you have the test pipes resonated, but after that is there a resonator?

 

 

have you been fapping alot lately? maybe all the dead kittens have accumulated in your trunk and are now fighting with one another... id check it out if i was you...

 

Yea yea, you are an as*

 

Why would the megan TP's cause this and not others. A pipe is a pipe.

 

haha, i was actually being serious when i wrote that post...
and yes, i am an ***... <=>


pewp

 

My appologies to you. After all the responses just poking fun I got frustrated. Where can I find this x pipe? Thanks

 

does your y-pipe have flex spots?

 

I don't have a y pipe. I have true duals from the TP's back. There is a H pipe or cross over I guess about 1/3 way back.

 

this happened to test pipes quite often. I found a few videos on youtube about the hissing when the RPM needle comes down. I too have Megan resontated tp and no hiss so far. Sound means and loud!

 

Found this https://my350z.com/forum/intake-exha...ow-x-pipe.html
Is that what you are talking about? Seems any muffler shop can make that.

 

omega^ says he has the same setup with the xpipe and still suffers from the RASP! i would do a little more investigating.

 

yeah, well that guy got the idea from the original thread... you could give it a try, probably wouldnt cost much, and yeah any muffler shop could do it, but im not sure if it would help with the tp's installed...