HELP. Im hearing a hissing sound or A loud suction sound around passenger side

[Kiggamaxwell]

I have a 2012 Honda civic si sedan
I hear a hissing sound or a loud suction sound coming from the passenger side when I step on gas passed 4k
I have a PLM downpipe installed. It didn't make that sound before.
I am thinking there might be a crack or something loose around the downpipe
Has anyone have the same noise??
Its not a open header sound it sounds like I have turbo without the blow off valve lol.

Going to get it checked out Saturday.

 

[FooBird]

Mine has that sound stock.

 

[webby]

People have said it makes that sound for while initially after install. It will continue to have a distinct sound, but lessen a bit after you put some miles on it. Does your downpipe have a cat or is it catless?

 

[Kiggamaxwell]

People have said it makes that sound for while initially after install. It will continue to have a distinct sound, but lessen a bit after you put some miles on it. Does your downpipe have a cat or is it catless?

cat less.
I installed it about 5 months ago with no problem until now. I am also tuned too.

 

[webby]

I'd get under the car and look at it then. Maybe you have a cracked weld or something. I've seen a couple people have cracks on their downpipe

 

[Kiggamaxwell]

I'd get under the car and look at it then. Maybe you have a cracked weld or something. I've seen a couple people have cracks on their downpipe

I am going to get under it Saturday.

 

[Kiggamaxwell]

Thanks for the feedback guys.
So I blew a gasket from the exhaust manifold to the downpipe. I guess PLM downpipe makes cheap *** gaskets lol. I ended up using the oem one that came with the stock header.
Thank god that's all it was.