Hey, just put a nismo cold air intake on my z and now at arround 5500 to 6500 rpms it is making this ratteling sound under the hood. It doesnt do it when i have it in neutral and just rev the engin up. Only when it is excellerating fast. Any Ideas to what it might be? Has anyone had problems like this?

 

This thread might get moved..

but anyway.. are all the pieces tight and connected?

 

it's prolly not sitting firmly. check the installation so your filter isn't dangling all over the place.

 

Check your installation, did you put in the vibra mount?